Problems Encountered in the Determination of 2,3,4-2′4′5′ Hexachlorobiphenyl (CB 138) in Environmental Samples

A. H. Roos State Institute for Quality Control of Agricultural Products, Bornsesteeg 45, 6708 PD, Wageningen, the Netherlands

P. G. M. Kienhuis State Institute for Quality Control of Agricultural Products, Bornsesteeg 45, 6708 PD, Wageningen, the Netherlands

W. A. Traag State Institute for Quality Control of Agricultural Products, Bornsesteeg 45, 6708 PD, Wageningen, the Netherlands

L. G. M. Th. Tuinstra State Institute for Quality Control of Agricultural Products, Bornsesteeg 45, 6708 PD, Wageningen, the Netherlands

Abstract

Selected individual chlorobiphenyls (CB) used for monitoring and tolerance purposes are checked on interferences using negative chemical ionization (NCI) mass spectrometry. An interference at the retention time of CB 138 (2,3,4-2′4′5′ hexachlorobiphenyl) was found. Quantitative results reported up till now and maximum residue limits (MRL) set for this compound are at least questionable.

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Problems Encountered in the Determination of 2,3,4-2′4′5′ Hexachlorobiphenyl (CB 138) in Environmental Samples

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Problems Encountered in the Determination of 2,3,4-2′4′5′ Hexachlorobiphenyl (CB 138) in Environmental Samples

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