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Validation of the analytical method for the simultaneous determination of selected polybrominated diphenyl ethers, polychlorinated biphenyls and organochlorine pesticides in human blood serum by gas chromatography with micro-electron capture detector

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Matuszak M., Minorczyk M., Goralczyk K., Hernik A., Strucinski P., Liszewska M., Czaja K., Korcz W., Lyczewska M., Ludwicki J. K.
Roczniki Państwowego Zakładu Higieny
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2016
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tom 67
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nr 2
Background. Polybrominated diphenyl ethers (PBDEs) as other persistent organic pollutants like polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) pose a significant hazard to human health, mainly due to interference with the endocrine system and carcinogenetic effects. Humans are exposed to these substances mainly through a food of animal origin. These pollutants are globally detected in human matrices which requires to dispose reliable and simple analytical method that would enable further studies to assess the exposure of specific human populations to these compounds. Objective. The purpose of this study was to modify and validate of the analytical procedure for the simultaneous determination of selected PBDEs, PCBs and OCPs in human blood serum samples. Material and Methods. The analytical measurement was performed by GC-μECD following preparation of serum samples (denaturation, multiple extraction, lipid removal). Identity of the compounds was confirmed by GC-MS. Results. The method was characterised by the appropriate linearity, good repeatability (CV below 20%). The recoveries ranged from 52.9 to 125.0% depending on compound and level of fortification. The limit of quantification was set at 0.03 ng mL-1 of serum. Conclusions. The modified analytical method proved to be suitable for the simultaneous determination of selected PBDEs, PCBs and OCPs in human blood serum by GC-μECD with good precision.
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Screening procedure for simultaneous determination of azaperone, carazolol, and chlorpromazine in animal urine

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Sell B., Posyniak A., Grylik M.
Bulletin of the Veterinary Institute in Puławy
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2011
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tom 55
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nr 3
A liquid chromatographic method coupled with UV-Vis and fluorescence detectors for the determination of azaperone, carazolol, and chlorpromazine residues in urine has been described. Analytes were isolated from biological samples with acetonitrvle. The obtained extracts were applied to solid phase extraction Strata X-C 33 µn Polimeric Strong Cation columns. The analytes were eluted with alkalised acetonitrvle. The whole procedure was validated according to European Decision 657/2002/EC. The detection limits were established at the level 2 µg/L for Carazolol and 5 µg/L for azaperone and chlorpromazine. Detection capabilities for carazolol, azaperone, and chlorpromazine were 8.62, 18.9, and 6.53 µg/L, respectively. Recoveries were above 90%.
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Conversion L-tryptophan to melatonin in the gastrointestinal tract: the new high performance liquid chromatography method enabling simultaneous determination of six metabolites of L-tryptophan by native fluorescence and UV-Vis detection

100%
Zagajewski J., Drozdowicz D., Brzozowska I., Hubalewska-Mazgaj M., Stelmaszynska T., Laidler P. M., Brzozowski T.
Journal of Physiology and Pharmacology
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2012
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tom 63
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nr 6
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