目的: 建立氧化型染发产品中对苯二胺等37种染发剂含量的一测多评方法,并验证该方法在染发产品质量控制中的适用性和准确性。方法: 采用HPLC法,以TechMate AQUA-STⅢ(250 mm×4.6 mm,5 μm)为色谱柱,以含4%(体积分数)乙腈的乙酸铵溶液-乙腈的混合液为流动相进行梯度洗脱,利用二极管阵列检测器,于235 nm和280 nm波长下进行测定。以2-硝基对苯二胺为参照物,建立该成分与其他36个成分的相对校正因子(fsi),利用fsi计算其他成分的含量;通过实际样品测定,将一测多评的计算值与标准曲线法测定值进行比较。结果: 37种染发剂在线性范围内线性关系良好,相关系数均大于0.999;加标回收率为81.7%~114.8%,重复性RSD均小于5.0%(n=6)。利用一测多评法与标准曲线法测定6批样品中各染发剂成分的含量,相对平均偏差(RAD)均小于4%,测定结果基本一致。结论: 建立的一测多评法可同时对染发产品中37种染发剂进行定量分析,且操作简便,结果准确,节约对照品,可为染发产品的质量控制和风险监测提供参考。
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