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本文以金纳米棒作为信号感应载体,在pH9.4弱碱性条件下通过维生素C还原AgNO3从而在金纳米棒表面形成包裹层,进而改变金纳米棒的等离子体共振吸收位移,据此建立了一种快速、简单、灵敏的维生素C的等离子体共振吸收位移测定法.方法的线性范围为0.25～10.0μmol/L,检出限(3σ)为0.12mol/L.该方法成功用于维生素C片剂分析,加标回收率95.4%～106.0%.与药典方法进行对比,有满意的精密度和准确度.
In this paper, gold nanorods were used as signal transduction carriers, and AgNO3 was reduced by vitamin C at pH 9.4 to form a coating on the surface of the gold nanorods, which in turn changed the plasmon resonance absorption displacement of gold nanorods A rapid, simple and sensitive method for the determination of vitamin C by plasma resonance absorption method with a linear range of 0.25 ~ 10.0μmol / L and a detection limit (3σ) of 0.12mol / L. The method was successfully applied to the determination of vitamin C Tablet analysis, spiked recoveries 95.4% ~ 106.0% .Compared with the pharmacopoeia method, there is satisfactory precision and accuracy.