在5.0 moL/L的HCl缓冲介质中,磷钨酸(Pwa)与莫西沙星(MXFX)和加替沙星(GTF)等氟喹诺酮类抗生素(FLQs)相互作用形成摩尔比1:1离子缔合物,导致体系的共振瑞利散射(RRS)显著增强并出现新的RRS光谱.MXFX和GTF的反应产物具有相似的光谱特征,最大散射波长位于320 nm附近,且药物浓度与散射增强(△I)成正比,2种氟喹诺酮类药物的线性范嗣分别为0.025～6.0 mg/L(MXFX)和0.023～9.0 mg/L(GTF).据此可建立用于测定氟喹诺酮类药物的简捷快速灵敏的新方法,方法用于胶囊和人尿液中的FLQs测定并取得满意结果.并对反应机理和RRS增强的原因进行了讨论.
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