DOI QR코드

DOI QR Code

Proficiency Testing for the Gas-chromatographic Analysis of Procymidone, Chlorpyrifos and Metolachlor Residues in Soil

가스크로마토그래피를 이용한 토양 중 프로사이미돈과 클로르피리포스, 메톨라클로르의 잔류분석 숙련도시험

  • Kim, Chan-Sub (Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Son, Kyeong-Ae (Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Gil, Geun-Hwan (Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Jin-Bae (Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Hong, Su-Myeong (Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kwon, Hye-Young (Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration)
  • 김찬섭 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 손경애 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 길근환 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 김진배 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 홍수명 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 권혜영 (농촌진흥청 국립농업과학원 농산물안전성부)
  • Received : 2012.12.06
  • Accepted : 2013.03.26
  • Published : 2013.08.30

Abstract

The proficiency testing for the residue laboratories of pesticide registration was conducted in order to improve the reliability and the ability for pesticide residue analysis. On October 2011 the testing was carried out using the soil collected and kept as the moistened state for five years, which is expected to very low residue levels of pesticides. The soil was fortified with chlorpyrifos, metolachlor and procymidone in a manner similar to prepare soil sample for indoor soil degradation test, and then sub-samples were prepared for the distribution to participants. Some of them were randomly selected for confirm of homogeneity and to ensure the stability of samples at room temperature. Samples were consisted of two soil treated as different levels, one of which was used to the assesment and another used to confirm. In addition, provide three standard solutions, respectively concentration of 10 mg/L, and untreated soil. Forty seven institutions submitted results. The medians of results were used as the assigned values for pesticide residues. Fitness for purpose standard deviation of proficiency test was calculated by applying 20% RSD as the coefficient of variation allowed in the soil residue test. Z-score was applied for evaluation of individual pesticides, and the average of the absolute value of the Z-score for the overall assessment of pesticides. Laboratories evaluated the absolute value of the Z-score less than 2 to fit the case of chlorpyrifos and procymidone were 44, metolachlor 40.

Acknowledgement

Grant : 농약시험 연구기관 정도관리체계 확립

Supported by : 농촌진흥청

References

  1. Analytical Methods Committee (2002) Understanding and acting on scores obtained in proficiency testing schemes. AMC Technical Brief No. 11.
  2. Analytical Methods Committee (2004a) Test for 'sufficient homogeneity' in a reference material. AMC Recommendation No. 1.
  3. Analytical Methods Committee (2004b) The amazing Horwitz function. AMC Technical Brief No. 17.
  4. Analytical Methods Committee (2005) General and specific fitness functions for proficiency tests and other purposes - clarifying an old idea. AMC Recommendation No. 2.
  5. Analytical Methods Committee (2009) The duplicate method for the estimation of measurement uncertainty arising from sampling. AMC Technical Brief No. 40.
  6. Kim C. S., J. B. Kim, G. J. Im, H. J. Park and Y. D. Lee (2009) Gas chromatographic performances for simultaneous determination of multi-pesticide residues and extraction of pesticides with three partition solvents. Korean J. Pesttic. Sci. 13:133-147.
  7. Kim C. S., B. M. Lee, K. H. Park, B. J. Park, J. E. Park and Y. D. Lee (2010) Simultaneous determination of pesticide residues in soils by dichloromethane partition - adsorption chromatography - GC-ECD/NPD analytical methods. Korean J. Pesttic. Sci. 14:361-370.
  8. Lee H. S., M. S. Kim and C. O. Choi (2001) A study on the proficiency test of pH measurements. Anal. Sci. Technol. 14:230-237.
  9. Medina-Pastor P., M. Mezcua, C. Rodriguez-Torreblanca and A. R. Fernandez-Alba (2010) Laboratory assessment by combined z-score values in proficiency tests: Experience gained through the European Union proficiency tests for pesticide residues in fruits and vegetables, Anal. Bioanal. Chem. 397: 3061-3070. https://doi.org/10.1007/s00216-010-3877-3
  10. Thompson M. (2000) Recent trends in inter-laboratory precision at ppb and sub-ppb concentrations in relation to fitness for purpose criteria in proficiency testing. Analyst 125:385-386. https://doi.org/10.1039/b000282h
  11. Thompson M., S. L. R. Ellison and R. Wood (2006) The international harmonized protocol for the proficiency testing of analytical chemistry laboratories (IUPAC technical report). Pure Appl. Chem. 78:145-196. https://doi.org/10.1351/pac200678010145

Cited by

  1. Proficiency Testing for the HPLC Analysis of Azoxystrobin, Imidacloprid and Methabenzthiazuron Residues in Soil vol.19, pp.3, 2015, https://doi.org/10.7585/kjps.2015.19.3.218