Liquid chromatographic separation of basic analytes is often hampered by problems, such as insufficient retention, wide and asymmetric peaks, etc, especially if carried out at acidic pH. Many modern HPLC coulmns can stand pH values up to 10 without problems…
A new software package for measurement uncertainty calculation called MUkit (shortcut from: Measurement Uncertainty kit) has been recently made available by SYKE, the Finnish Environmental Administration. This is the first software package that offers direct support for laboratories in measurement…
Electrospray ion source (ESI) is the most used ion source type for connecting liquid chromatography (LC) with mass spectrometry (MS) due to its robustness and possibility to analyze a wide range of analytes. ESI is a very good LC/MS ion…
On August 31, 2012 Irja Helm successfully defended her PhD Thesis High accuracy gravimetric Winkler method for determination of dissolved oxygen at Institute of Chemistry, University of Tartu. The essence of the work is development of a highly accurate gavimetric…
On 31.08.2012 the introductory meeting for first-year AMS students was held. Sergei Jurtšenko gave overview of the AMS programme, timetable of autumn semester 2012 and some practical aspects of living and studying in Tartu. The PDF file of this presentation…
Klodian Dhoska, graduated from AMS in 2010 shared his thoughts about how the programme has influenced his life during the last two years: “Experience at Applied Measurement Programme has given to me a very good career. I am technical expert…
The MSC Summer school finished on Jul 27, 2012. Kristjan Haav, one of the participants (from the AMS programme, University of Tartu) shared his impressions. Ivo: What would you single out as the top experiences in the summer school? Kristjan:…
As a nice counterbalance to the serious and challenging programme of the summer school last weekend there was a surfing outing at the summer school. All participants had the possibility to try surfing in the Atlantic Ocean under the guidance…
On Monday, July 16, 2012 the fifth Measurement Science in Chemistry International Summer School started in Fatima (Portugal). In this edition, 48 students from thirteen countries participate. The dense and challenging programme will give the students opportunities to learn and…
Alda Andersone from Latvia defended her master thesis on June 11, 2012. The title of the thesis was “The stereoselective synthesis of 2,2,5-trisubstituted tetrahydrofurans, oriented to the preparation of lilac aldehydes and alcohols”. The thesis was awarded the highest mark…
Hanno Evard defended his master thesis on June 11, 2012. The title of the thesis was “Study of paperspray ionization and its possible applications”. The thesis was awarded the highest mark “A”. Hanno talks about the thesis: “My master thesis…
Seven AMS master’s candidates successfully defended their theses on June 11, 2012. Congratulations! The PDF files of all the theses are available for download from here. (See at the end of the list: Hanno Evard, Karlis Andersons, Alda Andersone, Eyüp…
On May 21-22, 2012 a workshop Validation, Traceability, Measurement Uncertainty: the Challenges for the 21th Century Analysts took place in Berlin. This workshop focused on the relationship between method validation, traceability and measurement uncertainty in various fields of quantitative analytical…
On March 23, 2012 an in situ interlaboratory comparison measurement of dissolved oxygen concentration EstDO-2012 was carried out at the Testing Centre of University of Tartu. Altogether 14 participants from Estonia (different institutions), Germany (IO Warnemünde), France (IFREMER) and Finland…
During Mar 13-16, 2012 Ivo Leito visited University of Shanghai for Science and Technology (USST) and gave a series of lectures/workshops for te students of USST. The lectures/workshops were the following: — A Short Journey into Modern Analytical Chemistry —…
text by: Iuliia Demchuk Portugal… You will hardly find a person who doesn’t like it! This country is charming and most probably you will fall in love with it from the very first sight. Like it happened to me .…
Antonio Semakalu from Uganda defended his master thesis on February 28, 2012. The title of the thesis was “Gammmaspectrometrical Measurement of Radium Content in Water – Validation of Analysis Procedure”. The thesis is remarkable not only because it was awarded…
(text by John C Blackburn) Tartu is a different town in the summer. The days long and the streets quiet, Tartu is a student’s town, and is exciting when the students are in town. Its charm lies in its youthful…
Measurement science influences other sciences and sometimes from quite an unexpected angle. A recent review on extinction of the dinosaurs (the “Mass Extinction at the Cretaceous-Paleogene Boundary”, to put it in a scientifically correct way) published in the prestigious Science…
On Nov 29, 2011 a seminar was held in Tallinn, which summarized the results of the study “Metrology in Estonia, its current status, economic impact, trends and needs analysis” carried out during 2010-2011 jointly by BDA Consulting, University of Tartu…
This week a joint project will finish between University of Tartu and the German National Metrology Institute (PTB – Physikalisch-Technische Bundesanstalt) on providing training in Metrology in Chemistry for Indian analytical chemists. In the framework of this collabortion Ivo Leito…
For elimination of the disadvantages of the traditional procedure of smoking of fish and meat the so-called liquid smoke has been developed. Some steps during the production of liquid smoke reduce the PAH concentration in liquid smoke and in the…
Today on 27.09.2011 on the Laboratory days event at Finnish Environmental Administration – SYKE (Helsinki, Finland) Ivo Leito gave a presentation “Education in Metrology in Chemistry – why and how?”. The first part of the presentation demonstrates the strong need…
On 26.08.2011 the introductory meeting for first-year AMS students was held. Ivo Leito gave overview of the AMS programme, timetable of autumn semester 2011 and some practical aspects of living and studying in Tartu. The PDF file of this presentation…
Last week (on July 22, 2011) the closing ceremony of the MSC Summer School 2011 took place in Poznań (Poland). Results of the learning evaluation and student game were presented and certificates were awarded to the participants. The next MSC…
On Monday, July 11, 2011 the fourth Measurement Science in Chemistry International Summer School started in a west-central city of Poland in Poznań. There are students from fourteen countries. The summer school covers a wide-ranging list of topics: Importance of…
In roughly one month – on Sunday Jul 10 – the 2011 Summer School of the Measurement Science in Chemistry consortium will start. This is already the fourth of its kind and is this time organized by University of Warsaw…
Two AMS students will defend their master’s theses on June 8, 2011 at 10.15 a.m. (Tartu, Ravila Street, 14A, room 1021). The topics of the theses are related to testing of electrical power sources (Martynas Pelakauskas – ESTCube-1 Satellite Electrical…
Modern technologies allow very accurate measurements of atomic weights and isotope ratios of elements. This is of high importance in solving research problems in others fields. For example, accurate measurement of isotope ratios of carbon in the sample can be…
Unfortunately, it is not rare that during preparation of food substances with cancerogenic and/or mutagen activity are unwillingly introduced into food. A typical representatives of this group of dangerous substances are N-nitrosamines (NAs) which are found in various meat products.…
The light-emitting diode (LED) is a semiconductor device, which converts electric current into visible radiation, i.e. visible light. LEDs were discovered by accident in 1907, but no practical use was made of the discovery for several decades. Now they can…
LC-MS (Liquid chromatography mass spectrometry) with ESI (electrospray) ion source (LC-ESI-MS) enjoys ever increasing popularity as a powerful and versatile analytical tool. It has become the number one technique for a large number of different analytical tasks, ranging form pesticide…
Smoking as a way of preparation of fish and meat has been known to the humankind since the Stone Age. Smoking represents set of the chemical, thermal, diffusive and biochemical processes proceeding in preliminary salted product. Smoked fish contains compounds…
On 28.03.2011 Ivo Leito gave talk “ATR-FT-IR spectroscopy in the region of 550-230 cm-1 for identification of inorganic pigments” at the the 241th ACS National Meeting, Spring 2011 in Anaheim (CA). The presentation describes an analytical method for recording ATR-FT-IR…
On a seminar on measurement quality in the framework of the conference ChemBio Finland 2011 a presentation “Metrology in Chemistry – from pipette to mass spectrometry, from National Metrology Institute to student lab” was given by Ivo Leito. The presentation…
In the process of development and perfection of measurement technologies it became clear that all standards are not ideal. At measurement standards of the basic units it is necessary to take not man-made objects but much more perfect samples already…
Beer is the world’s most widely consumed and probably the oldest of alcoholic beverages; it is the third most popular drink overall, after water and tea. What is beer? Simply put, beer is a fermented, hop flavored, malt sugared, liquid.…
Most people (especially in the northern countries) have had the extremely annoying experience that in some (usually somewhat colder than average) morning the car will not start, because there is not enough charge in the battery. The battery is a…
Among the central reserach topics at Institute of Chemistry, University of Tartu is design and acidity measurements of superstrong acids – so-called superacids. These are acids that are more acidic than sulfuric acid (H2SO4), which is usually considered an epitome…
More than half of the solar energy that reaches the Earth and is absorbed by land srfaces is used for evaporation of water. Evapotranspiration is a joint process of moisture evaporation from the land and transpiration from plants. Recently a…
OECD has published the results of PISA 2009, the most recent edition of its Programme for International Student Assessment. The assessment methodology evaluates a number of abilities and skills of students, such as accessing and retrieving, integrating and interpreting information,…
Perfluorochemicals – most notably perfluorooctanoic acid (PFOA) and related compounds – have numerous industrial uses. They are highly stable molecules that do not decompose easily in the environment. It has been established that polar bears – the top predators in…
On Oct 26-27, 2010 a graduation ceremony was held at the EC JRC-IRMM (Geel, Belgium) where the first Euromaster certificates of the MSC Euromaster consortium were awarded to the first 32 graduates of the MSC consortium. The home universities of…
With the continuing globalization authenticity of food is becoming more and more important. This is especially true for highly valued types of food, such as certain olive oil, wines, honey, etc. Determination of authenticity – both geographical and botanical –…
On 29.09.2010 Maiu Varner defended her master’s thesis “The role of coatings in maintaining stability of panel paintings” at UT Institute of Chemistry. Panel paintings made on wood (e.g. icons) are very common in European Churches, especially in the eastern…
Compilation containing the full set of lecture slides of the Measurement Science in Chemistry (MSC) Summer School 2010 is now available for download in the Summer school section of the MSC web page (). These lecture materials in a compact…
Mass spectrometer (MS) with electrospray ionization (ESI) coulpled to a liquid chromatograph (LC) has during the recent decade become the most widespread analysis method of analysis for a vast number of microconstituents and contaminants (pesticides, mycotoxins, drug residues, etc) in…
pH value is the best known parameter for characterizing acidity of a solution. The pH of a neutral solution is around 7. In acidic solutions, such as battery acid, pH is around 0. In alkaline solutions, such as certain bleaches…
Yesterday (on July 31, 2010) the closing ceremony of the MSC Summer School 2010 took place in Lepanina (Estonia). Results of the learning evaluation and student game were presented and certificates were awarded to the participants. Traditionally the summer school…
The trend of increasing CO2 concentration in the atmosphere is well known. During recent years another, possibly as serious and wide-ranging, trend has caught the attention of scientists: decrease of dissolved oxygen concentration (deoxygenation) in the world’s oceans. In a…