摘要
甘蔗样品(2.00g)用乙腈10.0mL匀质提取,提取液经QuEchERS方法净化。所得净化液进行液相分离,以Hypersil Gold色谱柱为分离柱,以不同体积比的含0.1%(体积分数)甲酸的10mmol·L^(-1)乙酸铵溶液和乙腈的混合液为流动相进行梯度洗脱,质谱分析中采用电喷雾正离子源选择反应监测模式检测。10种除草剂的质量浓度均在10~1 000μg·L^(-1)内与其对应的峰面积呈线性关系,方法的测定下限(10S/N)在2~10μg·kg^(-1)之间。以空白样品为基体进行加标回收试验,所得回收率在82.3%~120%之间,测定值的相对标准偏差(n=6)在3.9%~8.2%之间。
The pretreated sugarcane sample （2.00 g） was homogeneously extracted with 10. 0 mL acetonitrile and purified by QuEchERS method. In LC separation Hypersil Gold chromatographic column was used as stationary phase, and mixtures of 10 mmol·L^-1 ammonium acetate solution containing 0. 1% （φ） formic acid and acetonitrile mixed in different ratio were used as mobile phase in gradient elution. ESI＋ and selective reaction monitoring were adopted in MS/MS. Linear relationships between values of peak area and mass concentration of the l0 herbicides were kept in the same range of 10-1 000μg·kg^-1 , with lower limits of determination （10S/N） in the range of 2- 10μg·kg^-1. On the base of blank sample, test for recovery was made by standard addition method; values of recovery found were in the range of 82. 3%-120%, with RSDs （n=6） in the range of 3. 9%-8. 2%.
出处
《理化检验（化学分册）》
CSCD
北大核心
2017年第5期507-511,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
广西壮族自治区直属公益性科研院所基本科研业务费专项课题(2013AC206)
