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Evaluation of accuracy for measurement of Dioxins (PCDDs/PCDFs) by using certified reference material (CRM)
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2009, v.22 no.5, pp.376-385
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(2009). Evaluation of accuracy for measurement of Dioxins (PCDDs/PCDFs) by using certified reference material (CRM). Analytical Science and Technology, 22(5), 376-385.
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Abstract
In our study, the accuracy for measurement of seventeen 2,3,7,8-substituted PCDDs/PCDFs in certified reference material (CRM) which is the sample of homogeneous sediment matrix taken from an area known to have significant chemical contamination, particularly PCBs (polychlorinated biphenyls), was evaluated. Though the methodology in this study followed the official method of unintentionally produced persistent organic pollutants (UPOPs) announced by the Ministry of Environment of the Republic of Korea in 2007, there were slight changes using additional purification step by activated carbon column because the interferences of sample were not sufficiently removed when only multi-silica column and alumina column have been used for purification. The |En| number proposed by the Korea Research Institute of Standards and Science was used for a valuation basis of the accuracy. The |En| numbers of seventeen 2,3,7,8-substituted PCDDs/PCDFs have been indicated as 1 and below, they were decided “Pass” in this test, when DB-5MS column and SP-2331 column were used together. Because 1,2,3,7,8-PeCDD and #169-HxCB were not separated on DB-5MS column, the ions of 1,2,3,7,8-PeCDD were selected at M/M+2 instead of M+2/M+4 suggested by EPA 1613. It is possible to distinguish them in HRGC/HRMS analysis.
- keywords
- PCDDs/PCDFs, CRM, accuracy, DB-5MS, SP-2331
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