GC/MS-SIM法检测稻谷中氯化苦残留

Determination of nitrotrichloromethane residues in grain by GC/MS-SIM

以无水乙醇为提取溶剂，建立了气相色谱质谱联用技术（GC／MS）-选择离子监测方法（SIM）检测粮食中氯化苦的方法，方法在0．20-5．0μg·mL^-1呈良好线性，线性系数为0．9988，检测限为0．020mg·kg^-1，方法回收率在89．0％-100．5％之间、精密度在3．8％～4．2％之间，满足检测需要。

After being extracted with Anhydrous Alcohol, the determination of nitrotrichloromethane residues in grain by gas chromatography-mass spectrometry in selected ion monitoring was established. The calibration curve showed good linearity in range of 0.20-5.0μg·mL^-1 ,the linear coefficient of 0.9988 was obtained, and the lowest limit of detection was 0.020mg ·kg^-1, the recovery was between 89.0%-100.5%. The degree of precision at the range of 3.8%-4.2% can satisfy the requirement of analysis for the nitrotrichloromethane.