Welcome to the March issue of EVISA's Speciation Newsletter !

Sample preparation is one of the most critical steps in speciation analysis.
The differentiation of species often calls for separation before detection. Such separation can be obtained by chromatographic or non-chromatographic separation modes. Non-chromatographic separation techniques such as ion exchange, solid phase extraction, dispersive solid phase extraction, dispersive liquid-liquid microextraction, dispersive micro-solid phase extraction and mixed-micelle cloud point extraction have been used for speciation analysis. Such techniques have the advantage of not requiring sophisticated instrumentation and can be combined with all detection techniques. However, due to their limited separation power, they can only be used for simple speciation cases, where two species have to be differentiated.

A group of Chinese researchers propose a method for thallium speciation analysis based on the separation of Tl(I) and Tl(III) by single-drop microextraction. The extraction is performed by a manual procedure and determination is done by graphite furnace atomic absorption spectrometry (see the news below).

The authors of this method mentioned its simplicity and low cost and expressed their hope that the method could find applications for environmental, food and biological samples. We do have some doubts, since the costs for laboratory personnel is totally ignored, and also the reproducibility of manual procedures is most often worse in comparison to instrumental techniques.

Anyhow, also some non-chromatographic separation techniques can be automated by an instrumental approach. Flow injection manifolds are an often used tool to mechanize such pretreatment techniques.  This is demonstrated by a group of Spanish researchers, who have developed a method for the speciation analysis of chromium based on solid phase extraction. The differentiation of Cr(VI) and total chromium is obtained by retention of the chromium species by a magnetic sorbent material followed by selective elution of Cr(VI) and total Cr. The whole procedure is done on a flow-injection manifold on-line coupled to inductively coupled plasma optical emission spectrometry (ICP-OES) (see the news below).

EVISA is keeping you updated with what is going on in speciation analysis. In this section you will find news about the most current research results, about trends, legal issues and information from manufacturers in the field of speciation analysis.

Unfortunately, this month we have not seen any publication related to speciation analysis of general interest. In case that you feel that we missed something, we would be happy to receive a notification. 

With all the links to further information and publications the News archive is a valuable collection of "hot topics" in speciation analysis. We continuously update even former news with new links and information so that all news are actual all the time.

Chromium speciation by magnetic solid phase extraction on-line with inductively coupled plasma optical emission spectrometry
A group of Spanish researchers have developed a method for the speciation analysis of chromium based on solid phase extraction using a magnetic sorbent.

Determination of Thallium Species in Food Samples by Microextraction and Graphite Furnace Atomic Absorption Spectrometry
A group of Chinese researchers have developed a method for thallium speciation analysis based on separation by single-drop microextraction.

With a list of about 50 current entries EVISA is informing you about interesting events and keeps you updated with their deadlines. By consulting our list of deadlines you won't miss the opportunity for early registration at reduced fee or the chance to submit your contribution in time.

NAWLA 2023: 4th North American Workshop on Laser Ablation
Date:     June 5,2023 - June 9,2023
Location:     University of Notre Dame, IN 46556 USA
March 15,2023  Extended:  Submission of abstracts

16th ISABC: 16th International Symposium on Applied Bioinorganic Chemistry,
Date:     June 11,2023 - June 14,2023
Location:     Ioannina, Greece
March 1,2023    Registration of authors
March 19,2023    Early registration at reduced fee
March 31,2023    Submission of abstracts

Goldschmidt 2023
Date:     July 9,2023 - July 14,2023
Location:     Lyon, France
March 1,2023    Submission of abstracts
May 31,2023    Early registration at reduced fee

ICOBTE & ICHMET 2023: 1st Joint International Conference
Date:     September 6,2023 - September 10,2023
Location:     Wuppertal, Germany
March 31,2023    Early registration at reduced fee

Please do not hesitate to inform us in case that your conference related to speciation analysis is missing in our Agenda.
PittCon 2023: 73th Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy
Location: Philadelphia, PA
Date: 18.03.2023 - 22.03.2023

Location: Vienna, Austria
Date: 11.04.2023 - 14.04.2023

DGMS 2023: 54th Annual Conference of the DGMS
Location: Dortmund
Date: 14.05.2023 - 17.05.2023

71st ASMS Conference on Mass Spectrometry and Allied Topics
Location: Houston, Texas
Date: 04.06.2023 - 08.06.2023

NAWLA 2023: 4th North American Workshop on Laser Ablation
Location: University of Notre Dame, IN 46556 USA
Date: 05.06.2023 - 09.06.2023

16th ISABC: 16th International Symposium on Applied Bioinorganic Chemistry,
Location: Ioannina, Greece
Date: 11.06.2023 - 14.06.2023


EVISA provides information about open positions for Ph.D. students, PostDocs and permanent staff in the field of speciation. Looking to fill a vacancy or needing a new career challenge? Either way this service is FREE. Many laboratories and research facilities (from Greenland to Crete) have already found their highly educated stuff through this service by EVISA. If you would like to post an open position here, please contact us at info@speciation.net !




De Montfort University (DMU) : Research Assistant
Working place: De Montfort University (DMU), Leicester, UK
Faculty: Faculty of Health and Life Sciences
Contract Type: Fixed Term; Full-time
Salary info: Grade E (£ 28,762-35,333)
Advert Closing Date: 19 March 2023


EVISA's directory of scientist is a versatile tool to facilitate contact with scientists in the field of speciation and related sciences. The directory is fully searchable for names, addresses, research topics etc.  You should bookmark this directory as an always up-to-date address book. (In order to hinder SPAM robots for collecting the E-mail accounts, we hide them in a special format).

More than 290 active scientists in the field of speciation analysis already joined the directory. Join this great directory that is extensively linked to all type of other information on this site, such as homepages, conferences and literature.

If your entry is still missing in this directory, please contact us at info@speciation.net.



EVISA provides an easy access to external information. Our database contains more than 2800 links to relevant information from numerous top scientific resources spread over the whole Web. The database is searchable both via full-text and categories such as elements, type of species and type of information. We are permanently updating our links section.

If your web site is missing here, please e-mail your link information to info@speciation.net.


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