UT_Participants_at_MSC_Summer_School_2016This week saw the start (on Mon, Jul 11, 2016) of the 9th MSC Euromaster summer school in Malle (near Antwerpen, Belgium).

As in previous years, a core aim of the Summer school is shifting the activities away from the classical lecture-type of teaching by increasing the share of discussions, hands-on work, teamwork. A key activity of the summer school is the contest of student teams (setting up virtual laboratories and interacting with customers), which tests their knowledge and skills in all areas of metrology in chemistry.

Four students from University of Tartu (EACH programme) take part in the summer school: Tetiana Melnyk, Aleksandra Lelevic, Rabin Neupane and Santosh Raman Acharya (on the photo, left to right).

We wish exciting and enjoyable Summer school to all participants!

(Photo: Irja Helm)


AMS_Master_Thesis_Defence_2016Today (June 06, 2016) 11 AMS master students successfully defended their master’s theses. Congratulations to all of you!

Photo on the left, from left to right: Xiaozhou Ye, Martinš Jansons, Oluwamayowa Sharon Sanni, Sylvestre Tc Pagkeu, Sofia Raquel Alves Oliveira, Stanislav Andres, Theofanis Panagiotopoulos, Max Hecht, Sagar Ramanbhai Patel, Rūta Veigure, Francis Gyakwaa.

As is usual for AMS the topics of the theses were diverse ranging from artificial photosynthesis to measurements in biochemistry and from determination of dangerous radionuclides to calibration of hygrometers. The full list of the defenders and their thesis titles is below. This list demonstrates well the ubiquitous nature of measurement science. The scientific/technological quality of the theses was high: a number of research papers are planned to be published on the basis of the theses and the results of one of them will be patented.Ruta Veigure discussing with the opponent AMS_Master_Theses_Defence_2016 (Photo on the right: Rūta Veigure discussing with the opponent)


Full list of students and thesis topics:

  • Sylvestre Tc Pagkeu, Joint application of an ARC-probe and antibody in homogeneous TR-FRET assay for determination of the concentration of protein kinase Pim2
  • Max Hecht, Investigations of chlorophyll interactions in Water Soluble Chlorophyll Binding Protein
  • Sofia Raquel Alves Oliveira, Role of the stringent response in antibiotic tolerance of Escherichia coli
  • Rūta Veigure, Development and validation of UHPLC-MS/MS method for analysis of sedative drugs and their metabolites in blood plasma
  • Oluwamayowa Sharon Sanni, Development and validation of gamma spectrometric analysis procedure using a high purity Germanium detector
  • Sagar Ramanbhai Patel, Development of foreign body detection methodology in industrial food preparation process
  • Theofanis Panagiotopoulos, Calibration of hygrometers at fluctuating and transient conditions
  • Francis Gyakwaa, Validation of alpha spectrometric analytical measurement procedure for the determination of Polonium-210 (210Po) in environmental samples
  • Xiaozhou Ye, Relationships between Environmental Factors and the Growth of Above-Ground Biomass in Boreal Forest
  • Martinš Jansons, Characterization of natural sedimentary dolomite and limestone reference materials from Geological Survey of Estonia using LA-ICP-MS
  • Stanislav Andres, Development of method for preliminary identification of cyclic dinucleotides in bacterial cultures


UT_Measurement_Uncertainty_MOOC_Participants_2016On May 17, 2016 the MOOC Estimation of measurement uncertainty in chemical analysis offered by University of Tartu finished successfully.
Alltogether 757 people registered (270 in 2014, 489 in 2015) from 85 countries. 455 participants actually started the course (i.e. tried at least one graded test at least once) and out of them 308 successfully completed the course (169 in 2015, 141 in 2014). The overall completion rate was 40% (52% in 2014, 34% in 2015). The completion rate of participants who started the studies was 67% (67% in 2014, 60% in 2015). These completion rates can be considered very good for a MOOC, especially one that has quite difficult calculation exercises, which need to be done correctly for completing the course.

The participants were very active and asked lots of questions. These were often very much to the point and addressed things that are really important to analysts in their everyday work. The course had several forums (general and by topic) and the overall number of posts to them during the course period reached beyond 500! (overall number of posts, both from participants and from teachers)

This active participation made teaching this MOOC a great experience also for us, the teachers. The discussion threads gave a lot of added value to the course and some of them triggered making important modifications to the course materials.

We want to thank all participants for helping to make this course a success!

We plan to repeat this course again in Spring 2017.


(Image: Wikimedia Commons)


UT100412AT462The series of works from the UT Analytical chemistry group on measuring and predicting ionization efficiency in the electrospray (ESI) ion source of MS and LC-MS has reached a new milestone: for the first time an ionization efficiency scale for the atmospheric pressure chemical ionization (APCI) source has been established.

The work led by Dr Riin Rebane (photo on the left) resulted in APCI ionization efficiency scale containing 40 compounds with widely ranging chemical and physical properties and spanning 5 orders of magnitude of ionization efficiency. Analysis of the resulting data challenges the common knowledge about APCI as ionization method. Contrary to the common knowledge, ionization efficiency order in the APCI source is surprisingly similar to that in the ESI source and most of the compounds that are best ionized in the APCI source are not small volatile molecules. Large tetraalkylammonium cations are a prominent example. These findings suggest that the atmospheric pressure chemical ionization mechanism can be more complex than generally assumed and most probably several ionization mechanisms operate in parallel and a mechanism not relying on evaporation of neutral molecules from droplets has significantly higher influence than commonly assumed.

See the original publication Anal. Chem. 2016, 88, 3435-3439 for more information.

(Photo: Andres Tennus)


Career_Seminar_EACHA key ability in today’s world is applying for a job. In order to be successful, writing CV and job application is of critical importance. For this reason these topics are included in the EACH/AMS programme.

On Wednesday 13.04.2016 Ms Heleri Olo from the UT Career service conducted a seminar (jointly for EACH and AMS students) on the “DO-s and DON’T-s” of writing a CV and motivation letter when applying for a job.

This seminar was the follow-up of the Employment/career session conducted by prof. Reiner Salzer at the EACH 2016 Winter School. At the winter school all participants were given a task to find a job offer at the RSC Jobs website and compose suitable CV and motivation letter. The CVs and motivation letters of students were then analysed both by prof. Salzer and by the UT Career service experts and the feedback was given by Heleri during the seminar.

Students found the whole exercise very useful. The employment-related session was one of the most liked sessions at the Winter school.


EC4LE_TrainMiCOn 9-11 June, 2016 a Master Class on Quality Assurance in Analytical Measurements, jointly organized by the European Centre for Laboratory Excellence and the TrainMiC training community.

There are still some places available, so be quick and check it out at www.ec4le.eu/program

This Master Class targets those teaching or training in the area of metrology and quality assurance in chemical analysis (Metrology in Chemictry, MiC), either regularly (as teacher) or occasionally (e.g. adult learning). The aim of the master class is to:

  • Keep up to date trainers’ technical knowledge, expertise and competence through a continuing professional development course
  • Enhance training effectiveness and efficiency by raising knowledge on adult learning strategies and active learning theories through workshop and discussion
  • Establish a long term community of practice

It will also be an opportunity for you to network with the TrainMiC® and EC4LE communities and participate in the TrainMiC® convention as well as celebrate its 15th Anniversary. You can also join to brainstorm about the future. Who knows, if you are a newcomer, you might be interested in joining one of these communities?

We look forward to seeing you in Zagreb in June 2016! We promise you an educational experience unlike any other!


UT_Measurement_Uncertainty_MOOC_Participants_2016On Monday, March 28, 2016 the web course “Estimation of Measurement Uncertainty in Chemical Analysis” was launched the third time as a MOOC (Massive Online Open Course).

The popularity of the course is this year somewhat higher than it was in 2014 and 2015: 744 participants from 85 countries (ranging from Bahama to Vietnam and from Zambia to Canada) have registered! (in 2014: 270 participants, in 2015: 400+) Image on the left shows the countries where the participants come from. As in the previous years, the majority of participants are from analytical laboratories, once again demonstrating the continuing need for training in measurement uncertainty estimation in analytical chemistry.

The full course material is accessible from the web page https://sisu.ut.ee/measurement/uncertainty. Some developments and improvements have been made to the course material, in particular, some more self-tests ave been added. The course materials include videos, schemes, calculation files and numerous self-tests (among them also full-fledged measurement uncertainty calculation exercises). In order to pass the course the registered participants have to take six graded tests and get higher than 50% score. These tests are available to registered participants via the Moodle e-learning platform. Participants who successfully pass the course will get a certificate from the University of Tartu.

It is planned to run this course as MOOC again in Spring 2017.

(Image: Wikimedia Commons)


Measurement_Uncertainty_MOOC_Course_UTThe third edition of the MOOC (Massive Open Online Course) Estimation of Measurement Uncertainty in Chemical Analysis will be running during Mar 28 – May 8, 2016. Registration is open!

We currently have more than 250 registered participants from more than 50 countries.

The full course material is accessible from the web page https://sisu.ut.ee/measurement/uncertainty. The course materials include videos, schemes, calculation files and numerous self-tests (among them also full-fledged measurement uncertainty calculation exercises). In order to pass the course the registered participants have to take six graded tests and get higher than 50% score. These tests are available to registered participants via the Moodle e-learning platform. Participants who successfully pass the course will get a certificate from University of Tartu.

You are welcome to distribute this message to potentially interested people!


EACH_Winter_School_2016_Dissolved_oxygen_intercomparisonThe second day of the EACH Winter school was full of excitement.
The key event of the second day was dissolved oxygen intercomparison between the student teams. The samples were water samples from the nearby lake Pühajärv. The student teams used optical oxygen sensors (based on luminescence), see the photo on the left. The seriousness of the intercomparison is underpinned by the independent reference values determined using the highly accurate primary Winkler titration procedure (developed by Irja Helm in her PhD thesis).
EACH_Winter_School_2016_Group_PhotoThe results of the intercomparison will be summarized at the closing of the Winter school.

On the right you can see the group photo (Lake pühajärv is behind the trees) taken right after the lunch and followed by a spontaneous snow fight (photo on the left) where the “African team” (Ime and Olivier, in the centre) performed stunningly well in comparison to the Nordic snow fighters!

EACH_Winter_School_2016_Snow_FightThe consortium committee spent most of the day interviewing students and discussing (including negotiations with university officials about maximum possible numbers of students) for distributing students to study tracks. The day ended with the long-awaited announcement that it will be possible to grant every student the preferred study track!

EACH_Winter_School_2016_Students_of_the_Uppsala_Study_trackOn the photo on the right you can see prof. Bergquist and his team taking pictures of the students selected for the Uppsala study track.





EACH_Winter_School_2016_LectureToday, on Jan 25, 2016, the first Winter School of the EACH programme started in Pühajärve (Estonia). Altogether 24 students from 17 countries participate (besides EACH students, also some other international students from Tartu have been invited, most of them from the AMS programme). Leading European analytical chemistry experts act as teachers and supervisors at the Winter School.

The Winter School offers a diverse set of activities to the participants. There are lectures on advanced analytical chemistry topics, tasks on data analysis and choosing analytical strategies. One of the sessions is specifically dedicated to employment opportunities of analytical chemists. The most ambitious part, a full-fledged in situ intercomparison measurement (between student teams) of dissolved oxygen concentration in lake water, will be carried out on the second day of the Winter School.

The intense working is counterbalanced by winter sports activities and relaxing in spa/swimming pool.

Full information about the Winter School activities is available at http://www.ut.ee/EACH/each-winter-school/


Random_and_Systematic_Effects_TimelineIn a recent edition of the premier journal devoted to quality and metrology in chemistry Accreditation and Quality Assurance Ivo Leito has attempted to express in very simple terms the essence of Metrology in Chemistry. In the article Accred. Qual. Assur. 2015, 20, 229–231 he arrived at three main recommendations:

1. Whenever possible, comparisons with reference values should be carried out. The reference values can be realized in different ways: Certified reference materials (CRMs), Laboratory reference materials (LRMs), Measurements with reference methods, etc.

2. Data on stable samples should be collected over long time periods (e.g. as the X chart), in order to evaluate as many sources of variability in the analysis method, as possible. The longer the time period, the more systematic effects will become random and thus easier to evaluate (more on this topic can be found in a recent review on bias).

3. “Do not stop there!”, meaning that the above mentioned activities should run in a lab on a continuous basis.

As a conclusion, it can be said that constant improvement is the key to reliable analytical results.


LogoWe are glad to announce that registration for the EcoBalt 2016 conference has been officially opened today! Please see the address http://www.ut.ee/akki/ecobalt-2016

The First Circular contains all the important information and is available from the above page.

EcoBalt 2016 is an international research conference that will address all scientific and technological developments in the field of environment and its protection: air, water, soil, contamination assessment and options for its reduction, environmentally friendly technologies and products, recycling, biodiversity, environmental education, etc. The conference will be held on 9.-12. October 2016 in Tartu, Estonia, in the Dorpat conference centre.

EcoBalt 2016 is organised by the Estonian Center of Analytical Chemistry. You are welcome to contact us (Dr. Riin Rebane, riin.rebane@ut.ee) with any questions or requests that you have.


IsoFood Hg Training_Draft Programme_2.11.2015_Page_1
During Nov 25-27, 2015 the training seminar “Quality assurance for Hg measurements in food and environmental samples” was held at the Jožef Stefan Institute in Ljubljana. Ivo Leito participated as a teacher and conducted discussion sessions Validation data (Reproducibility, recovery, etc) and their meaning, Measurement uncertainty and Traceability: what it is and how to demonstrate it?.

Ivo_Leito_teaching_metrology_in_chemistry_in_Ljubljana_Nov_2015The seminar was highly successful – there was in-depth discussion during each of the sessions and the discussions continued during coffee breaks. The measurement uncertainty session featured a full-fledged uncertainty estimation (contaminant determination by LC-MS), which the participants carried out themselves on laptop computers that they had brought with them.

It is expected that the collaboration between UT and Jožef Stefan Institute (and other research centres in the region) will continue and deepen.


Analuutilise_Keemia_Kvaliteedi_Infrastruktuur_ENGOn Oct 14, 2015 Tallinn University of Technology and University of Tartu jointly organized the first cooperation festival “Right time, right place” (“Õigel ajal õiges kohas”), venue: Mektory innovation centre, Tallinn).

The festival aimed first of all at intensifying collaboration between Estonian industry and academia, but also between different research teams of the two universities. The interest in the event was so large that at some point pre-registration was stopped because of too many participants. The participant number who eventually participated in the event reached 430.

The analytical chemistry research group of UT was also present at the festival and promoted the ECAC distributed interdisciplinary research infrastructure. ECAC unites the competence and analytical capabilities of three prominent organizations in Estonia: University of Tartu, Tallinn University of Technology and the Estonian Environmental Research Centre and offers access to analytical instruments as well as services and collaboration both to academia and industry. Ivo Leito made a presentation about the analytical possibilities of ECAC that can be of interest to the Industry: Analüütilise Keemia Kvaliteedi Infrastruktuur (AKKI) (in Estonian).

Signe Vahur with ATR-FT-IR Instrument at Cooperation Festival Oct 2015

Signe Vahur with ATR-FT-IR Instrument at Cooperation Festival Oct 2015

In addition, we demonstrated our FT-IR analysis capability and had a fully operational ATR-FT-IR instrument with us (image on the right), enabling any interested person to run material analysis of either the samples that we brought with us or almost anything that could be found on site. People were very interested in the analysis of wood coatings, different polymers and also of their own clothes (e.g. for determining whether a necktie is made of silk or polyester) and research fellow Signe Vahur – our main FT-IR expert – was busy all the day to record and interpret spectra and give explanations to interested people.

This possibility of instant ATR-FT-IR analysis proved to be the most popular topic in the Chemistry thematic room of the festival and attracted much attention from people with very different backgrounds. This is not surprising – this instrumental method has been in the core of a number of research collaboration projects with industry in the past and is expected to be so also in the future.

EACH and AMS students strongly benefit from the expertise and instrumentation that has been accumulated by ECAC (AKKI). Several of the EACH/AMS teachers are directly involved in ECAC and a number of ECAC’s instruments are used in teaching and thesis work.


Leito_Measurement_Uncertainty_MOOC_Euroanalysis_2015On Sept 07, 2015 Ivo Leito gave a presentation Using MOOCs for teaching analytical chemistry: experience at University of Tartu at the Euroanalysis XVIII (Bordeaux, France).

The presentation outlined the contents and organisation of the material in the on-line course Estimation of measurement uncertainty in chemical analysis, the ways of using it (for independent learning, for self-testing, as an information source and as a basis for running as a MOOC) and the experience of running it as a MOOC (Massive Open Online Course) at University of Tartu in spring 2014 and 2015. Part of the presentation was devoted to analyzing the pros and cons of MOOCs as a way of teaching and in particular as a way of teaching analytical chemistry (or its subdisciplines). It was concluded that MOOCs do have advantages, especially if compared to short training courses for practitioners. The talk created quite some interest and discussions after the session.

Detailed discussion of this topic has been published: I. Leito, I. Helm, L. Jalukse. Anal Bioanal Chem 2015, 407, 1277–1281.
The course material as well as the link to registration for the spring 2016 edition of the course is available from https://sisu.ut.ee/measurement/


EACH_Student_Introductory_Meeting_2015Today (Aug 31, 2015) the introductory meeting of the EACH Erasmus Mundus (running on teh basis of the AMS programme) students with the programme coordinators took place at UT Chemicum.

All the 18 students (originating from Ukraine, China, India, Jordan, Congo, Nepal, Nigeria, Montenegro, Serbia, Macedonia, USA and Estonia), who start their studies in EACH in this autumn were participating. An overview of the programme was given (the slides are available from here) and a large number of questions were asked and answered, accompanied by tea/coffee and cake.

This is the first group of students who start their studies in the EACH Erasmus Mundus programme, so, exciting months are ahead, both for students and programme teachers/coordinators!

Photo on the left: EACH Students and their Tutor Kaisa Tihkan (on the right).


UT_Students_at_MSC_Euromaster_Summer_School_2015The MSC Euromaster Summer School 2015 in Pulawy (Jul 12-24, 2015) was again a success and the student feedback were very positive. Two reflections from AMS students are presented here:

Sagar Patel: I will remember my time spent in summer school held at Pulawy (Poland) for a lifetime. It was amazing and I don’t have words to express my feelings. I got very useful and practical knowledge about Metrology in Chemistry, statistics, interactions with customers, ISO 17025 and many more. Apart from studies I got a chance to work with students and professionals from different countries.

Karl Kütt: The MSC Summer school on metrology in chemistry has been a great addition to my studies. It combines the theoretical knowledge that I have learned in my program with the teamwork skills and real world problem solving skills that one encounters when running a real laboratory or a project. The course had extensive lessons on both uncertainties in chemistry and validation (a key aspect in the ISO 17025 standard). The neat thing about the summer school is that in its practical exercises you’re not presented with a wrong or a right way, but a situation in which every decision has its pros and cons. I think going to the summer school greatly improved my skills in working in a group, solving complicated problems as well as helped me make important contacts and great friends in the field of metrology.

Image on the left: UT students who participated in the MSC Summer School 2015, from left to right: Sagar Patel (India), Sylvestre Pagkeu (Cameroon), Martins Jansons (Latvia), Karl Kütt (Estonia)

Group_Photo_MSC_SS_2015This week saw the start (on Mon, Jul 13, 2015) of the 8th MSC Euromaster summer school 2015 in Puławy (Poland).

As in previous years, a core aim of the Summer school is shifting the activities away from the classical lecture-type of teaching by increasing the share of discussions, hands-on work, teamwork. As usual, a key activity of the summer school is the contest of student teams (setting up virtual laboratories and interacting with customers), which tests their knowledge and skills in all areas of metrology in chemistry.

This year the summer school makes further advances in terms of this “core shift”. One of the modules, which was carried out differently, was measurement uncertainty, which was the the main responsibility of UT during the summer school. Instead of the classical way – starting with lecture and then moving to discussion – the students were well in advance of the Summer school asked to learn the basic (and quite some not so basic) topics of measurement uncertainty using the web course Estimation of Measurement Uncertainty in Chemical Analysis. This way the lecturing part was omitted completely from the Summer school, as students had the necessary preparation. Thus, the whole measurement uncertainty module at the Summer school consisted of a big session of discussions and problem solving.

Another module, where hands-on work was very important was the Internal and external quality control module (delivered mainly by Ricardo Da Silva from University of Lisbon). He organised an “interlaboratory comparison” between students (in visual photometry) as a part of the session! Students were very excited to see how their results compared to their colleagues’ results.

The summer school still has one week to go and will finish on Fri, Jul 24, 2015.



Graphical_AbstractThe LC-MS group at the UT Institute of Chemistry were recently invited by the journal Analytica Chimica Acta to write a tutorial review on the topic of validation of liquid chromatography mass spectrometry (LC-MS) methods. This LC-MS method validation guide has now been completed. The tutorial review intends to give an overview of the state of the art of method validation in liquid chromatography mass spectrometry (LC–MS), especially with electrospray ionisation (LC-ESI-MS), and discuss specific issues that arise with MS (and MS-MS) detection (i.e. LC-MS-MS) in LC (as opposed to the “conventional” detectors). The review was eventually split in two parts (because of its large volume):

(as an April joke from Elsevier, part II appears page-wise before part I)

The review addresses and compares all the major validation guidelines published by international organizations: ICH, IUPAC, AOAC, FDA, EMA (EMEA), Eurachem, SANCO, NordVal, European Commission Decision 2002/657/EC. With every performance characteristic the tutorial review briefly compares the recommendations of the guidelines.

The Part I briefly introduces the principles of operation of LC–MS (emphasizing the aspects important from the validation point of view, in particular the ionization process and ionization suppression/enhancement); reviews the main validation guideline documents and discusses in detail the following performance parameters: selectivity/specificity/identity, ruggedness/robustness, limit of detection, limit of quantification, decision limit and detection capability. The Part II starts with briefly introducing the main quantitation methods and then addresses the performance related to quantification: linearity of signal, sensitivity, precision, trueness, accuracy, stability and measurement uncertainty. The last section of Part II is devoted to practical considerations in validation and a possible step by step validation plan specifically suitable for LC-MS-MS is presented.

With every method performance characteristic its essence and terminology are addressed, the current status of treating it is reviewed and recommendations and help are given, how to determine it, specifically in the case of validation of LC–MS methods. In many cases the published guidelines remain too general for being of help to practicing analyst. This LC-MS method validation tutorial review gives more specific advice based on the best available practice and can be used as a kind of LC-MS method validation manual.

Based on the recommended approaches presented in this guide to LC-MS method validation an LC-MS validation software ValChrom is currently under development by the UT team. The software development is supported by the EU Regional Development Fund (Development of software for validation of chromatographic methods, Project No. 3.2.1201.13-0020).


kvaliteedimark_sOn Apr 16, 2015 the consortium Estonian e-University awarded the title “e-course of the year” to the web course (MOOC) Estimation of Measurement Uncertainty in Chemical Analysis! This, together with the very positive feedback of the participants is a strong motivator for us to continue developing and delivering this course. Delivery of the next edition is planned in Spring 2016.

The 2015 edition of the “Estimation of Measurement Uncertainty in Chemical Analysis” course finished on Sunday, Apr 19, 2015. The overall number of registered participants was 489 (from 70 countries). The majority of the participants were practitioners from analysis laboratories and industry. Sadly, in spite of the reminders, more than 200 of them never actually started the course. Out of the 279 participants who started their studies 169 completed the course successfully. Thus, the overall completion rate (with respect to registered participants) is 34% and the completion rate of the participants who started the course is 60%, which can be considered reasonably good. Clearly the most difficult tests were the ones of weeks 5 and 6 containing full-fledged measurement uncertainty estimation using the ISO GUM and the Nordtest approaches. The ability to carry out uncertainty estimation of such analyses is essential and we are glad that so many participants managed to successfully complete these tests!

There were many interesting discussions of which some are still ongoing. By interacting with the participants we also learned a lot and we again got good suggestions for developing the course.

Many thanks to all our participants, without whom all this would have never become true!


(Image: private collection)