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  • Title: EC-GLC determination of the herbicidal monohalogenated phenoxyalkyl acid mecoprop in tissues, urine and plasma after derivatization with pentafluorobenzylbromide.
    Author: De Beer J, Van Peteghem C, Heyndrickx A.
    Journal: Vet Hum Toxicol; 1979; 21 Suppl():172-7. PubMed ID: 505951.
    Abstract:
    An EC-GLC method for the determination of the systemic herbicide methylchlorophenoxypropionic acid (meco prop), a monohalogenated phenoxyalkyl acid, in 0.5 gram of rabbit tissues and in one ml human urine and plasma, is presented. Monohalogenated chlorophenoxyalkyl acids can reach a high sensitivity for electron-capture detection as pentafluorbenzylester derivatives; so their minimum detectable amount is about 5 pg. A test-tube micro-extraction method for MCPP fromurine, plasma and homogenized tissues with benzene, after acidification with 2 N HC1, the derivatization the residue, and the column clean-up over silicagel, are described in detail. Results of recovery studies with variation-coefficient determination are given by analysis of spiked tissues liver and brain, urine and plasma using p-chlorophenoxy-isobutyric acid (CPIB) as the internal standard. With this method other chlorophynoxyalkyl acid herbicides also can be determined in biological post-mortem material
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