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本文提出了车间空气中氧化镉新的分光光度测定方法。用微孔滤膜采样后,用稀硝酸溶解氧化镉,在碱性条件下,使镉与对磺酸基苯重氮氨基偶氮苯生成红色络合物。方法的灵敏度。回收率、精密度分别为0.08μg/25ml、91～98.8%、1.24～3.05%(镉浓度0.25～3.Oμg/25ml)。在最佳条件下的吸光度直线回归方程Y=0.159x+0.008,r=0.9996,ε=1.58×10~5L/mol·cm。可用于车间空气中氧化镉的含量测定。
This paper presents a new spectrophotometric method for the determination of cadmium oxide in the air of the workshop. After sampling with a microporous membrane, cadmium oxide is dissolved with dilute nitric acid to produce a red complex of cadmium with p-sulfobenzenediazoaminoazobenzene under basic conditions. The sensitivity of the method. The recovery and precision were 0.08μg / 25ml, 91 ~ 98.8% and 1.24 ~ 3.05% respectively (cadmium concentration 0.25 ~ 3.0μg / 25ml). Under the optimum conditions, the linear regression equation of absorbance Y = 0.159x + 0.008, r = 0.9996, ε = 1.58 × 10 ~ 5L / mol · cm. Can be used in the workshop air cadmium content determination.