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Research Article

Veterinary utility of dried blood spots for analysis of toxic chlorinated hydrocarbons

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Pages 29-37 | Received 09 May 2017, Accepted 08 Jul 2017, Published online: 26 Jul 2017
 

Abstract

Dried blood spots (DBS) on filter paper provide a simple and convenient means of collecting, storing and shipping samples for veterinary diagnostics related to toxin exposures. This paper presents validation data on analysis of DBS for chlorinated persistent organic pollutants, specifically 4,4′-dichloro-diphenyl-trichloroethane (4,4′-DDT) and its breakdown product 4,4′-dichlorodiphenyl-dichloroethylene (4,4′-DDE), lindane and a representative polychlorinated biphenyl (PCB) congener PCB-153. Analysis was by gas chromatography with electron capture detection (GC-ECD). The method required one 12.5 mm diameter spot representing application of 50 μL of blood, and working limits of detection (LOD) for each of the compounds was 5 ppb. Data are presented on development and description of the method, assay precision, LOD and quantitation, linearity, accuracy, specificity, effects of long-term storage and ruggedness. The method was also applied to 27 avian DBS, and 4,4′-DDE was detected in the majority of samples.

Acknowledgement

The authors acknowledge Michael Church for his valuable contributions to instrument troubleshooting, data acquisition and data analysis.

Disclosure statement

No potential conflict of interest was reported by the authors.

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