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目的建立测定痕量阿莫西林的共振瑞利散射法。方法以甲基紫作探针的共振瑞利散射法测定阿莫西林。结果在pH 9.90的Tris-HCl溶液中,阿莫西林和甲基紫相互作用后,共振瑞利散射显著增强,在376 nm处的△IRRS最强。阿莫西林的浓度在2.0×10-8~1.5×10-6 mol.L-1内与△IRRS成正比,检出限(3Sb/S)为0.042μg.mL-1。结论该法简便、快速、灵敏,可用于痕量阿莫西林的测定。
Objective To establish a resonance Rayleigh scattering method for the determination of trace amoxicillin. Methods Amoxicillin was determined by resonance Rayleigh scattering with methyl violet as probe. Results Resonance Rayleigh scattering was significantly enhanced after the interaction of amoxicillin and methyl violet in pH 9.90 Tris-HCl solution. The △ IRRS at 376 nm was the strongest. The concentration of amoxicillin was proportional to △ IRRS in the range of 2.0 × 10-8 ~ 1.5 × 10-6 mol·L-1, and the detection limit (3Sb / S) was 0.042μg.mL-1. Conclusion The method is simple, rapid and sensitive and can be used for the determination of trace amoxicillin.