Determination of five pesticides in fishpond by SPE-GC/MS / 法医学杂志

OBJECTIVE@#To establish the solid phase extraction (SPE) with GC/MS technology for fish poisoning cases to determine five pesticides in fishpond.@*METHODS@#By three solid phase extraction column including Oasis HLB cartridge, Bond Elut C18 and SampliQ C18, the recovery rate was compared to extract and purify five pesticides in fishpond. The effects of different kinds and dosages of eluents on extract rate were also reviewed.@*RESULTS@#Using Bond Elut C18 as solid phase extraction column and 3 mL benzene as eluent, the linear range of mass concentration of five pesticides in fishpond was 1-50 μg/mL, and the correlation coefficient was 0.996 2-0.999 6. The limit of detection was 3.4-26 μg/L and the recovery was 61.49%-102.48%. The relative standard deviations was less than or equal to 3.01%. CONCLU-SION: With high sensitivity, good accuracy and precision, SPE-GC/MS has simple and quick operation and less solvent. It can be applied to determination of five pesticides in fishpond.

Analysis of pesticides in blood specimen by GC/MS with accelerated solvent extraction / 法医学杂志

OBJECTIVE@#To develop the accelerated solvent extraction (ASE) for determining pesticides present in blood samples.@*METHODS@#Pesticides were extracted by ASE with optimized parameters to study recovery rate affected by extraction temperature, time and agent. GC/MS was used to perform quantitative analysis.@*RESULTS@#The recovery rates of eight pesticides were 70.6%-92.4%. The coefficient of variation was less than 5.0%. A good linear relationship was obtained at the concentration range of 0.5-5.0 microg/mL.@*CONCLUSION@#The method was fast and simple with high recovery rate and good repeatability. It can be applied to analyze pesticides present in the blood specimen.