摘要
用盐酸溶解聚合氯化铝,代替GB15892-1995国标中的前处理,以火焰原子吸收法直接测定其中的铅、镉含量。回收率铅为89.0-93.0%,镉为90.5-97.0%,其变异系数分别为0.82-2.92%、1.25-5.53%。仪器灵敏度铅、镉分别为0.4mg/L,0.03mg/L。取样品5.0ml,最低检出浓度铅、镉分别为4mg/L,0.3mg/L。用该法测定,不受铅、铁等多种元素的干扰。建议推广使用。
Aluminium polychlorid was dissolved with hydrochloric acid (HCL) instead of the pretreatment method in state standard (GB15892-1995), and the content of Pb and Cd in it were directly tested by flame atomic absorption spectrometry(FASS). The rescovery rates of Pb and Cd were 89.0-93 .0% and 90.5-97 .0% respectively; the coefficients of variation(CV) were 0.82- 2.92% and 1 .25%-5 .53 respectively; the instrnmentd Sensitivitys were 0. 4mg/L and 0. 03mg/L respetively. The minimum detectable concentrations (MDC) of Pb and Cd were 4mg/L and 0. 3mg/L respectively in 5 .0ml sample. This method was not interfered by Al. Fe and other elements, so it could be ed widely.
出处
《广东卫生防疫》
1998年第2期3-5,共3页
Guangdong Journal of Health and Epidemic Prevention