【摘要】 应用分子吸收光谱法对不同行业废水中的硫化物进行了测定。当水样不含干扰物质时可直接测定 ,否则需经沉淀、过滤、洗涤前处理。进行了与碘量法和吹气 -对氨基二甲基苯胺光度法的对比试验 ,所测结果较为一致。分子吸收光谱法的线性范围为 0 1mg/L～ 4 0mg/L。取 5mL样品直接测定 ,检测限为 0 0 5mg/L ;取 50mL样品经沉淀等前处理后 ,检测限为 0 0 0 5mg/L。测定速度快 ,直接测定最多 2min即可测一个样品 ;经前处理 ,测定一个样品约需 2 0min。更多还原

【Abstract】 Sulfate from different waste waters was determined by absorption spectrum of gaseous molecules. It can be detected directly without interference, otherwise pretreatment was needed such as deposition, filtration and washing. Comparison showed the results were the same between Iodine method and paminodimethylaniline spectrophotometric method. The linear range was 01 mg/L～4 mg/L. Detection limits were 005 mg/L for 5 mL sample and 0005 mg/L for 50 mL sample and treatment such as deposition. The method is fast and direct. The detection took 2 minutes excluding sample treatment and 20 minutes including treatment.更多还原