亚硝酸根重氮化-偶联反应共振散射光谱测定

Application and study on resonance scattering spectra of diazotization-coupling reaction

目的研究重氮化-偶联反应的共振散射光谱并应用于亚硝酸根的测定。方法利用磺胺-N,N-二甲基苯胺-亚硝酸根间发生的重氮化-偶联反应,通过共振散射光谱法测定痕量亚硝酸根。结果方法的线性范围为0~1.2×10^-3g/L,检出限为8.0×10^-5g/L。结论该方法简单、灵敏度高、选择性好,用于蔬菜中亚硝酸根含量的测定,回收率为92.8%~98.5%。

Objective To study resonance light seattering（RLS） spectra of diazotizationcoupling reaetion and establish a new method for the determination of traee nitrite. Methods RLS spectra was used to determine traee nitrite by the diazofization- coupling reaction between sulfanilie amide-N, N-dimethyl aniline-nitrite. Results The linear range of this method was on 1.2 × 10^-3g/L and the detection limit was 8.0 × 10^-3g/L.Conelusion The method were simple, with high sensitivity and good selectivity. It was used to determine traee nitrite in vegetable samples. The recovery was 92.8 % - 98.5 %.