摘要
采用顶空毛细管气相色谱法测定吡虫啉中的丁酮残留量。样品经二氯甲烷溶解，用HP-5毛细管色谱柱分离，氢火焰离子化检测器检测，顶空平衡温度为70℃，平衡时间为10min，以外标法计算含量。丁酮的质量浓度在2．0-510．0μg／mL范围内线性关系良好，相关系数r=0．9997，方法的检出限为0．5μg／mL，样品3个水平的加标回收率为99．4％-102．1％，测定结果的相对标准偏差小于3．0％（n=5）。该方法简便快速，准确可靠，可用于吡虫啉产品的质量控制。
A method was established for the determination of butanone in imidacloprid by headspace capillary gas chromatography. A HP-5 capillary column was used with FID detector at injection temperature of 70 ~C and equilibrium time of 10 min. The sample was dissolved by dichloromethane and its butanone concentration was calculated by external standard method. Butanone showed good linearity within 2.0-510.0 μg / mL with the correlation coefficient of 0.999 7. The detection limit was 0.5μg/mL. The recoveries for butanone were 99.4%-102.1%, and the relative standard deviation was less than 3.0%. The method is simple, rapid, accurate and reliable, and it is applicable for product quality control.
出处
《化学分析计量》
CAS
2014年第6期62-64,共3页
Chemical Analysis And Meterage
关键词
丁酮
吡虫啉
顶空毛细管气相色谱
butanone
imidacloprid
headspace capillary gas chromatography
