Abstract
A proficiency test for the analysis of pesticide residues in brown rice was carried out to support upgrading in analytical skills of participant laboratories. Brown rice containing three target pesticides (etofenprox, fenitrothion, and isoprothiolane) was used as the test samples. The test samples were distributed to the 57 participants and analyzed by appropriate analytical methods chosen by each participant. It was shown that there was no significant difference among the reported values obtained by different types of analytical method. The analytical results obtained by National Metrology Institute of Japan (NMIJ) were 3 % to 10 % greater than those obtained by participants. The results reported by the participant were evaluated by using two types of z-scores, that is, one was the score based on the consensus values calculated from the analytical results of participants, and the other one was the score based on the reference values obtained by NMIJ with high reliability. Acceptable z-scores based on the consensus values and NMIJ reference values were achieved by 87 % to 89 % and 79 % to 94 % of the participants, respectively.
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References
Araujo P, Frøyland L (2006) Anal Chim Acta 555:348–353
Zhu Y, Kuroiwa T, Narukawa T, Inagaki K, Chiba K (2012) Trends Anal Chem 34:152–160
International Organization for Standardization (2005) ISO/IEC 17025: general requirements for the competence of test and calibration laboratories. ISO, Geneva
National Statistics Center, Japan (2012) Table of food supply and demand. URL Available at: http://www.e-stat.go.jp/SG1/estat/GL08020103.do?_toGL08020103_&listID=000001117396&requestSender=dsearch Accessed June 27, 2014; in Japanese
Ministry of Agriculture, Forestry, and Fisheries, Japan (2013) Summary of export and import for agricultural and marine products. URL Available at: http://www.maff.go.jp/j/tokei/kouhyou/kokusai/houkoku_gaikyou.html%23r21. Accessed June 27, 2014; in Japanese
Codex Alimentarius Commission (1997) Guidelines for the assessment of the competence of testing laboratories involved in the import and export control of food CAC/GL 27-1997. Rome, Italy
International Organization for Standardization (2010) ISO/IEC 17043: conformity assessment-general requirements for proficiency testing. ISO, Geneva
Thompson M, Ellison SLR, Wood R (2006) Pure Appl Chem 78:145–196
De Bievre P, Peiser HS (1997) Fresenius J Anal Chem 359:523–525
Quinn TJ (1997) Metrologia 34:61–65
Richter W (1997) Accred Qual Assur 2:354–359
Milton MJT, Quinn TJ (2001) Metrologia 38:289–296
Otake T, Itoh N, Aoyagi Y, Matsuo M, Hanari N, Otsuka S, Yarita T (2009) J Agric Food Chem 57:8208–8212
International Organization for Standardization (2006) Guide 35: reference materials – general and statistical principles for certification, 3rd edn. ISO, Geneva
Otake T, Yarita T, Aoyagi Y, Kuroda Y, Numata M, Iwata H, Watai M, Mitsuda H, Fujikawa T, Ota H (2013) Food Chem 138:1243–1249
National Institute of Advanced Industrial Science and Technology, National Metrology Institute of Japan (2009) Reference Material Certificate, NMIJ CRM 7504-a – Pesticides in Unpolished Rice. URL Available at: https://www.nmij.jp/english/service/C/crm/61/7504a_en.pdf. Accessed June 27, 2014
Judprasong K, Puwastien P, Boonpor J, Pinprapai N (2013) Food Chem 140:598–607
Thompson M (2000) Analyst 125:385–386
Linsinger TPJ, Pauwels J, van der Veen AMH, Schimmel H, Lamberty A (2001) Accred Qual Assur 6:20–25
Saldanha H, Sejeroe-Olsen B, Ulberth F, Emons H, Zeleny R (2012) Food Chem 132:567–573
Ministry of Health, Labor, and Welfare, Japan (2006) Analytical methods for residual compositional substances of agricultural chemicals, feed additives, and veterinary drugs in food. URL Available at: http://www.mhlw.go.jp/english/topics/foodsafety/positivelist060228/dl/060526-1a.pdf. Accessed June 27, 2014
Hiramatsu S, Nishiyama K, Tokuhashi S, Ashida T, Kageyama A, Takamiya M, Nakamura A, Takuma N, Nishimori K (2013) Rep Pub Health Kochi 59:47–52 (in Japanese)
Norman KNT, Panton SHW (2001) J Chromatogr A 907:247–255
Ono Y, Yamagami T, Nishina T, Tobino T (2006) Anal Sci 22:1473–1476
Anastassiades M, Lehotay SJ (2003) J AOAC Int 86:412–431
Lehotay SJ, Maštovská K, Lightfield R (2005) J AOAC Int 88:615–629
Payá P, Anastassiades M, Mack D, Sigalova I, Tasdelen B, Oliva J, Barba A (2007) Anal Bioanal Chem 389:1697–1714
Zhang L, Liu S, Cui X, Pan C, Zhang A, Chen F (2012) Cent Eur J Chem 10:900–925
Unites States Environmental Protection Agency (2007) METHOD 6800: elemental and speciated isotope dilution mass spectrometry. Washington, DC, USA
Binici B, Bilsel M, Karakas M, Koyuncu I, Goren AC (2013) Talanta 116:417–426
Poole CF (2007) J Chromatogr A 1158:241–250
Otake T, Aoyagi Y, Matsuo M, Itoh N, Yarita T (2008) J Environ Sci Health B 43:390–394
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Otake, T., Yarita, T., Aoyagi, Y. et al. Evaluation of the performance of 57 Japanese participating laboratories by two types of z-scores in proficiency test for the quantification of pesticide residues in brown rice. Anal Bioanal Chem 406, 7337–7344 (2014). https://doi.org/10.1007/s00216-014-8160-6
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DOI: https://doi.org/10.1007/s00216-014-8160-6