固相萃取-高效液相色谱法测定豆芽中4-氯苯氧乙酸钠和6-苄基腺嘌呤的残留量

Chemical Analysis and Meterage(2017)

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Abstract
建立了测定豆芽中4-氯苯氧乙酸钠和6-苄基腺嘌呤的固相萃取-高效液相色谱法.样品以0.1 mol/L的盐酸溶液为提取剂,经C18固相萃取柱净化处理,以乙腈-10 mmol/L乙酸铵水溶液(体积比25:75)为流动相,TechMate C18-ST色谱柱分离,4-氯苯氧乙酸钠和6-苄基腺嘌呤的紫外检测波长分别为228 nm和267 nm,色谱峰面积外标法定量.在0.50~100.00 mg/L浓度范围内,4-氯苯氧乙酸钠的相关系数为0.9998,精密度在1.3%~8.2%之间(n=6),回收率在103.1%~109.0%之间;在0.05~10 mg/L浓度范围内,6-苄基腺嘌呤相关系数为0.9999,精密度在0.9%~3.8%之间(n=6),回收率在88.0%~95.4%之间.4-氯苯氧乙酸钠和6-苄基腺嘌呤的检出限(S/N=3)分别为0.24,0.02 mg/kg.该法可以同时完成豆芽中4-氯苯氧乙酸钠和6-苄基腺嘌呤的分析检测.
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Key words
bean sprout,4-chlorobenzene sodium acetate,6-benzylaminopurin,high performance liquid chromatography,solid phase extraction
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