气相分子吸收光谱法测定废水中硫化物

应用分子吸收光谱地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。进行一与碘量法和吹气－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０．０５ｍｇ／Ｌ；取５ｍＬ样品沉淀等有处理后，检测限为０．００５ｍｇ／Ｌ。测定速度快，直接测定最多２ｍｉｎ即可测一个样品；

Determination of Sulfatein Waste Water by Absorption Spectrum of Gaseous Molecules

Sulfatefrom different waste waters wasdetermined by absorptionspectrum ofgaseous molecules.Itcan be detected directly withoutinterference, otherwise pretreatment w as neededsuch as deposition,filtration and washing. Comparison showed theresults werethesame betweenIodine method and p-amino-dimethylanilinespectrophotometric method. Thelinearrange was 0.1 mg/L~ 4 mg/L. Detectionlimits were 0.05 mg/L for5 mL sample and 0.005 mg/L for50 mL sample andtreatmentsuch asdeposition. The methodisfastand direct. The detectiontook 2 minutesexcludingsampletreatmentand 20 minutesincluding treatment.