摘要
用亚硝酸盐把亚铁氰化钾氧化为铁氰化钾后,与鲁米诺、尿酸组成化学发光体系,建立了一种间接测定痕量亚硝酸盐的方法。探讨了酸度、反应物浓度、干扰离子等因素的影响。该方法的检出限为5.0×10^(11)g/mL,线性范围为1.0×10^(-9)～1.0×10^(-5)g/mL。对熟肉制品样品进行11次平行测定,回收率为92.8％～107.6％,测定结果的相对标准偏差为2.2％～3.9％。
In acidic medium that NO2 oxidize [Fe(CN)4~ to [ Fe( CN)6 ]3- and luminol-[Fe(CN)6]3- uric acid
chemiluminescence system was coupled together, thus a new method for the determination of trace nitrite was developed. The effect of factors as consistency of various substance of reaction , acidity, disturbing ions etc. on the analytical results were studied. Under optimal condition, the linear range for the determination of NO2- was 1. 0×10 -9- 1. 0×10-5 g/mL and the detection limit was 5. 0 ×10-11 g/ mL. It was applied to the determination of trace nitrite in the cooked meat samples, the recovery was 92. 8% ~ 107. 6% , and the relative standard deviation was 2.2%-3.9%.
出处
《化学分析计量》
CAS
2003年第3期29-30,共2页
Chemical Analysis And Meterage
