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阳极溶出伏安法灵敏度高,适用于环境监测。我们用此法对10~(-10)M的镉、铅样品进行了分析,并实际应用于城市居民区大气飘尘中镉与铅的测定。一仪器与材料 AD-1型极谱仪; 安劳D-4型粉尘采样器; 石英舟:长50mm,宽12mm,厚7mm; 0.2ml刻度吸管:最小分度0.002ml; 快速定量滤纸:将直径为38毫米的滤纸,置于3%的硝酸中煮沸1分钟,取出后洗至中性,于60～80℃烘干备用。二主要试剂镉、铅标准溶液:1mg ml~(-1),称取纯金属镉与铅各0.5000克,分别用硝酸(1+1)15毫升溶解,加热
Anodic stripping voltammetry with high sensitivity, suitable for environmental monitoring. We used this method to analyze cadmium and lead samples of 10 ~ (-10) M and applied them to the determination of cadmium and lead in airborne dust of urban residential areas. An instrument and materials AD-1-type polarography; Angola D-4-type dust sampler; quartz boat: 50mm long, 12mm wide and 7mm thick; 0.2ml graduated straw: the smallest index 0.002ml; Filter paper 38 mm in diameter, boiled in 3% nitric acid for 1 minute, removed after washing to neutral, at 60 ~ 80 ℃ drying reserve. Two main reagents Cadmium, lead standard solution: 1mg ml ~ (-1), weighed pure metal cadmium and lead each 0.5000 grams, respectively, with nitric acid (1 +1) 15 ml dissolved, heated