建立了同时测定调味品中糖精钠和合成色素的固相萃取-高效液相色谱(SPE-HPLC)分析方法.样品经石油醚低温去除油脂,聚酰胺固相萃取柱净化和富集,然后进行HPLC分析.采用反相C18色谱柱,以甲醇和0.02mol/L醋酸铵为流动相进行梯度洗脱,使用可变波长分别在230、510、484和510 nm进行检测.实验结果表明:糖精钠与合成色素的分离效果良好,回收率为88.6% ~ 97.1%,相对标准偏差小于5%;方法检出限均可达到0.05mg/kg.该方法操作简单,结果准确可靠,重现性好,适用于大批量调味品中甜味剂和人工合成色素的同时检测.
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