How to improve geochemical data quality. Proficiency testing in geochemistry?

How to improve geochemical data quality. Proficiency testing in geochemistry?

Dates: 10 December 09:00-13:00 OR 14:00-18:00 CET
This workshop is offered twice to accommodate participants in different time zones.

Organizers: Thomas C. Meisel (Montanuniversität Leoben), Peter Webb and Dieter Garbe-Schönberg (University of Kiel), Michael Wiedenbeck (GFZ Potsdam)

Proficiency Testing (PT) and Interlaboratory Comparisons (ILC) are important tools to demonstrate competency for a particular measurement discipline, that can also be used to validate a measurement procedure or method, for technical training of personnel and to get a handle or estimate on the reproducibility precisions (i.e. between laboratories). While PT schemes are organized by an independent third party e.g. the International Association of Geoanalysts (IAG), ILC are self-organised e.g. characterising a δ114/110Cd for a reference material (isotope standard) value through the contribution of measurement results from independent research laboratories, in cases where PT schemes are not available.

Participating in PT rounds is not only useful for finding serious errors in a routine measurement procedure and improving data quality but also to demonstrate the validity of measurement results published in the literature or provided to scientists outside of a research lab.

In this workshop we will provide background information on proficiency testing schemes in general and PT schemes in particular applied to geological materials for major and trace element mass fractions (GeoPT mainly XRF and ICP-MS), to microanalytical techniques (G-Probe mainly LA-ICP-MS) and geochronological zircon data (G-Chron mainly TIMS and LA-ICP-MS). Interesting outcomes from more than 50 rounds of GeoPT, 12 rounds of G-Probe and one G-Chron round will be presented and discussed. For ILC studies on isotope standard (solutions) and isotope reference materials (solids) background information will be provided on how to organise round robin tests that should help to improve data quality in a long run and to characterise reference materials for method development and method validation.
Presenters are:
Prof. Thomas C. Meisel, General and Analytical Chemistry, Montanuniversität Leoben, Austria
Dr Peter Webb Retired from The Open University, UK
Dr Dieter Garbe-Schönberg, Marine Climate Research, University of Kiel, Germany
Dr Michael Wiedenbeck, GFZ Potsdam, Germany.

This event will not be recorded.


Member $50 $20
Non-member $60 $30


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Students and professionals from countries classified by the World Bank as having low-income or lower-middle-income economies may apply for free registration. Please contact us with your name, institution, and country to apply.

Geochemical Society members automatically receive the discounted member rates. European Association of Geochemistry (EAG), International Association of Geoanalysts (IAG), and Mineralogical Society of America (MSA) members can receive the discount by sending us a message with your name and society member number.

Code of Conduct

The GS strives to provide a respectful and comfortable learning environment for everyone who participates. By registering for the workshop, you agree to abide by the code of conduct.

Cancellation Policy

You may cancel your registration until 3 December 2020 for a refund, minus a processing fee of $25. No refunds will be made for cancellations made after 3 December. One substitution is allowed for no charge. To transfer your registration to someone else, please contact us.