摘要
目的建立溶液吸收-气相色谱质谱检测法测定天麻中二硫代氨基甲酸酯(盐)类农药残留量的方法。方法目标物在加热条件下经溶液吸收,转化为二硫化碳,经正己烷萃取,采用气相色谱质谱法间接测定二硫代氨基甲酸酯(盐)类农药含量。对云南省16州市采集的55件天麻中的二硫代氨基甲酸酯(盐)类农药的残留量进行统计分析。结果该方法的线性范围为〇.02~10tng/kg,相关系数0.9996,定量限0.010mg/kg,空白基质加标回收率90.5%~丨05.0%,相对标准偏差(relative standard deviation,RSD)为4.77%(«=6)。55件天麻样品检出率23.6%,平均值0.021 mg/kg,含量范围为ND〜0.275 mg/kg。结论该方法简便、快速、灵敏,适合天麻中二硫代氨基甲酸酯(盐)类农药的测定。采集的天麻样品中二硫代氨基甲酸酯(盐)类农残含量水平总体较低。
Objective To establish a method of determination of dithiocarbamate (salt) pesticides inGastrodiaelata by solution absorption-gas chromatography-mass spectrometry. Methods The target substance wasabsorbed by the solution under heating, converted into carbon disulfide, extracted by w-hexane, and the content of thedithiocarbamate (salt) pesticide was indirectly determined by gas chromatography-mass spectrometry. The residualamount of dithiocarbamate (salt) pesticides in 55 gastrodia collected in 16 cities of Yunnan province was statisticallyanalyzed. Results The linear range of the method was 0.02-10 mg/kg, the correlation coefficient was 0.9996, thelimit of quantification was 0.010 mg/kg, the recovery rate of blank matrix was 90.5%-105.0%, and the relativestandard deviation (RSD) was 4.77% ( n= 6 ) . The detection rate of 55 gastrodia samples was 23.6%, the average valuewas 0.021 mg/kg, and the content range was ND〜0.275 mg/kg. Conclusion This method is simple, rapid andsensitive, which is suitable for the determination of dithiocarbamate (salt) pesticides in Gastrodiaelata. The level ofdithiocarbamate (residue) pesticide residues in the collected Gastrodiaelata samples was generally low.
作者
张婷
段毅宏
李彦生
朱鹏静
刘建辉
ZHANG Ting;DUAN Yi-Hong;LI Yan-Sheng;ZHU Peng-Jing;LIU Jian-Hui(Yunnan Center for Disease Control and Prevention^Kunming 650022,China)
出处
《食品安全质量检测学报》
CAS
2019年第22期7576-7581,共6页
Journal of Food Safety and Quality
关键词
天麻
二硫代氨基甲酸酯(盐)
气相色谱质谱法
农药残留
Gastrodiaelata
dithiocarbamate (salt)
chromatography-mass spectrometry
pesticide residue
