摘要
实验建立了一种简便、快速测定亚硝酸盐含量的新方法。在这种方法中,NO2-与对氨基苯磺酸发生重氮化反应,将反应液缓慢倒入由吸附1-萘酚的D290树脂填充的吸附柱中生成红色的偶氮染料。亚硝酸盐测定的线性范围为0.1μg/mL～10.0μg/mL,检出限为0.1μg/mL。将显色结果与标准比色卡比对可进行生活饮用水和肉制品中亚硝酸盐含量的定性和半定量分析,结果满意。
Simple and rapid method for the determination of nitrite was developed. The method is based on the reaction of nitrite with sulfanilic acid to form a diazonium ion. The resulting solution was then introduced onto a mini column packed with D290 particles coated with 1-naphthol and reacted with 1-naphthol to form an colored anionic azo dye. The detection limit was 0.1 μg/mL and the linear range was 0.1 μg/mL-10.0 μg/mL for nitrite determination. The method was applied to the determination of NO2--N in drinking water and food samples with reference color card for qualitative or semi-quantitative determination and satisfactory results were obtained.
出处
《食品研究与开发》
CAS
北大核心
2007年第3期134-138,共5页
Food Research and Development
