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Accredit Qual Assur 2022 10;27(4):181-193. Epub 2022 May 10.

Research Center for Environmental and Clean Technology, National Research and Innovation Agency, Bandung, Indonesia.

The first proficiency testing of pesticides in fruits and vegetables in Indonesia is reported. This report covers the findings of five-year proficiency testings. Every year, from 2016 to 2020, 18-25 laboratories join the proficiency testings and analyze 5-11 pesticides in tomato, orange, lettuce, brown rice, strawberry respectively. Read More

J Pestic Sci 2021 Aug;46(3):297-303

College of Agriculture, Ibaraki University, 3-21-1 Chuo, Ami, Inashiki, Ibaraki 300-0321, Japan.

Matrix certified reference materials (CRMs) and proficiency testings (PTs) are effective for evaluation of the quality of analytical results. The National Metrology Institute of Japan has developed five kinds of CRMs and has provided eight PTs so far for the quantification of pesticide residues in foods. Target pesticides were sprayed on growing crops, and the harvests were used for the preparation of CRMs and PT samples. Read More

J Pestic Sci 2019 Aug;44(3):192-199

National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, Ibaraki 305-8563, Japan.

From 2012 to 2018, proficiency testings (PTs) were carried out to support the analytical skill development of participants. Grains were sprayed with various target pesticides and used as material samples for PTs. It was found that 27-56% and 10-43% of participants used the Japanese official multiresidue method and a solid-phase extraction technique with the Quick, Easy, Cheap, Effective, Rugged, and Safe (modified QuEChERS, known as "STQ" in Japan) method, respectively. Read More

Talanta 2015 Jan 19;132:285-93. Epub 2014 Sep 19.

RSE Kazakh Institute of Metrology, Almaty, Kazakhstan.

Classical measurements of performances are typically based on linear scales. However, in analytical chemistry a simple scale may be not sufficient to analyze the analytical performance appropriately. Here partial order methodology can be helpful. Read More

Tissue Antigens 1986 Mar;27(3):131-41

The main purpose of Eurotransplant, an international organ exchange organisation, is to maximize the survival time of transplanted organs through tissue typing and matching. Regular proficiency testings are necessary to assess the reproducibility and the reliability of the HLA typings performed by the individual typing centres. Two different protocols have been used: 1) since 1978, 35 samples of blood and donor spleen were used for cell exchanges (CE) and typed by all participating laboratories; 2) since 1977 samples of donor spleen have been shipped to the reference laboratory in Leiden for retyping (RD) resulting in over 2600 comparable HLA typings. Read More