液相色谱串联质谱法测定水果中复硝酚钠残留量
Chemical Analysis and Meterage(2015)
Abstract
以甲醇提取样品,采用超高效液相色谱串联质谱法(UPLC–MS/MS)测定水果中复硝酚钠的残留量。以甲醇–10 mmol/L乙酸铵水溶液(体积比为60∶40)为流动相,质谱采用电喷雾负离子MRM检测模式。对硝基苯酚钠和5-硝基愈创木酚钠的线性范围为0.05~2.00 mg/L,检出限为0.01 mg/kg,邻硝基苯酚钠的线性范围为2.5~100.0 mg/L,检出限为0.5 mg/kg,线性相关系数均大于0.995。实际样品中对硝基苯酚钠、邻硝基苯酚钠和5-硝基愈创木酚钠的加标回收率分别为83.0%~93.4%,81.0%~87.4%,83.0%~91.8%,测定结果的相对标准偏差小于7%(n=6)。该法操作简单、快捷,精密度、准确度高,适用于水果中复硝酚钠的残留分析。
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Key words
UPLC-MS/MS,compound sodium nitrophenolate,residue,fruit
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