建立了固相萃取-高效阴离子交换色谱-积分脉冲安培法(SPE-HPAEC-IPAD)测定人体尿液中异黄蝶呤的分析方法.尿液经ENVI-18与732型阳离子交换柱串联萃取后,除去了大量干扰物质.采用IonPac AS21分析柱(250 mm×2 mm),以0.025 mol/L NaOH溶液为淋洗液,流速为0.40 mL/min,在优化的安培检测波形条件下,异黄蝶呤的质量浓度在0.005～0.200mg/L 范围内与峰面积呈良好的线性关系,相关系数为0.998 4,检出限为0.003 mg/L.健康人及癌症病人尿液在2 mg/L 和5 mg/L 两个添加水平的平均回收率在95.4% ～96.8%之间,相对标准偏差小于5%.此方法环保、快速、准确,可用于健康人与癌症病人尿液中异黄蝶呤的测定.
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