GC-MSD法测定纺织品中含氯苯酚残留量

采用气相色谱-质谱联用法（GC-MSD），测定及确证纺织品中含氯苯酚残留量。用碳酸钾溶液提取试样，提取液经乙酸酐乙酰化后以正己烷提取，用配有质量选择检测器的气相色谱仪，采用选择离子检测进行确证，外标法定量。五氯苯酚和四氯苯酚添加水平在0．05～2．00mg／kg时，该方法平均回收率为88．8％～97．3％，精密度为2．41％～6．74％，方法测定低限为0．05mg／kg，各项指标均满足有关要求。

Determination of residual chlorinated phenols in textiles via GC-MSD method

This method is feasible to determine and confirm residual contents of chlorinated phenols in textiles by GC-MSD method. The testing samples are extracted with potassium carbonate solution, the extract solution are extracted with n-hexane by acetic anhydride acetylization. Determination and confirmation is made by GC-MSD , using external standard method. According to the experimental data, the fortifying concentrations of tetrachlorophenol and pentachlorophenol in textiles range from 0.05 mg/kg to 2.00 mg/kg, the corresponding recovery is 88.8 % - 97.3 %, the precision is 4.43 % - 11.78 %, and the limit of determination is 0.05 mg/kg. All the technical items conform to the requirements.