建立了高效液相色谱-蒸发光散射检测仪( HPLC-ELSD)同时检测食品中安赛蜜、糖精钠、甜蜜素、三氯蔗糖和阿斯巴甜5种甜味剂的方法.甜味剂经0.1％ (v/v)甲酸缓冲液提取后,利用C18固相萃取小柱净化浓缩,以3μmC18柱为分离柱,0.1％ (v/v)甲酸(氨水调节pH =3.5)-甲醇(61∶39,v/v)为流动相,经高效液相色谱法分离,蒸发光散射检测器进行检测.结果表明,5种甜味剂在30～1 000 mg/L的范围内,具有良好的线性关系(相关系数大于0.997)；在3个添加水平下,样品的平均回收率为85.6％ ～ 109.0％,相对标准偏差小于4.0％；方法检出限(LOD,信噪比(S/N)=3)分别为安赛蜜2.5 mg/L、糖精钠3 mg/L、甜蜜素10 mg/L、三氯蔗糖2.5 mg/L及阿斯巴甜5mg/L.该方法简单、灵敏、操作成本低,可用于不同形态食品中多种甜味剂的同时检测.
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