共振光散射光谱法测定亚硝酸根的研究  

Research on determination of nitrite by resonance light scattering spectra

作　　者：高旭[1] 李树伟[1] 马玉洁[1] 李琼[1] 唐微微[1] 

机构地区：[1]四川师范大学化学与材料科学学院,四川成都610068

出　　处：《贵州化工》2012年第1期20-21,24,共3页Guizhou Chemical Industry

基　　金：重庆市教委(批准号:KJ051201)

摘　　要：基于在盐酸介质中,亚硝酸根与氨基苯磺酸发生重氮化反应,氨基苯磺酸共振光散射强度随亚硝酸根的加入量增加而明显降低的现象,建立了新的共振光散射法测定亚硝酸根的方法。该方法对亚硝酸根检测的线性范围为0.01～0.70?g/mL,检出限为7.2ng/mL(3σ)。该方法应用于自来水中亚硝酸根离子的测定,回收率为93.1%～105.7%。In a dilute HCl medium,when diazo-reaction between nitrite ion and sulfanilic acid was occurred,the resonance light scattering（RLS） intensity of sulfanilic acid was quenched by NO2-,the magnitude of decrease RLS intensity（IRLS） with directly proportional to the concentration of NO2-.The linear calibration range for nitrite was 0.01～0.70μg/mL with a detection limit of 7.2ng/mL（3σ）.The proposed method was used in the determination of nitrite ion in tap-water samples,giving recovery range of 93.1%～105.7% with satisfactory results.

关 键 词：共振光散射 亚硝酸根 氨基苯磺酸 

分 类 号：O657.3[理学—分析化学]