农残项目乙拌磷的稳定性

甲拌磷的响应还是挺高的

我做过甲拌磷，峰高与峰面积随时间推移越来越小，标液也来自环境保护所，但我问过同行，他们说没这现象，让换其它厂家的标液试试。

二硫松(Disulfoton) 農藥有效成分檢驗方法 一般储存条件下稳定。

METHOD 8141BORGANOPHOSPHORUS COMPOUNDS BY GAS CHROMATOGRAPHY

A liquid chromatography-tandem mass spectrometry method was developed and validated for simultaneous determination of disulfoton and five of its oxidative metabolites (disulfoton-sulfoxide, disulfoton-sulfone, demeton-S, demeton-S-sulfoxide and demeton-S-sulfone) in human whole blood and urine. Extraction was undertaken using a QuEChERS method, which is commonly used in food analysis. D10-Disulfoton was used as the internal standard. Separation was carried out using a CAPCELL-PAK MG II column (35×2.0 mm i.d., 5 μm, Shiseido) with a mobile phase of 10 m mol/L ammonium formate and methanol. This method was applied in an autopsy case, and disulfoton and its oxidative metabolites were successfully detected in both blood and urine. The concentrations of disulfoton in the blood and urine were 360 and 23.8 ng/mL, respectively. There was a relatively low concentration of demeton-S in both the blood (4.0 ng/mL) and urine (45.7 ng/mL). To date, there have been no reported cases of detection of demeton-S in human samples.