摘要
本文提出水中痕量硫的离子浮选—分光光度测定法。应用硫离子在高铁离子存在下,与对氨基二甲基苯胺生成的次甲基蓝,与阴离子表面活性剂—十二烷基硫酸钠缔合浮选的机理,快速而选择性地富集于气液界面,在最佳的体系条件下,取样1000毫升,检测限可低至1微克,相对标准偏差为3.6％,标准加入回收率达91～99％,分析一次试样仅需60分钟。这一方法现已成功地应用于天然淡水,饮用水中ppb数量级硫的测定。
Ion flotation followed by a spectrophotomctric determination of sulfide ion in water is discussed. It is based on the formation of methylene blue from sulfide ion through reacting with N, N-dimethyl-p-phenylenediamine in the presence of ferric ion. And on the flotation of methylene blue by an anionic surfactant, sodium lauryl sulfate, sulfide is rapidly and selectively collected into gas-liquid interface. Under the optimum conditions established, up to lug of sulfide in 1000ml of sample can be detected. The precision of the ion flotation-spectrophotometric method, in terms of relative standard deviation was 3.6%. The standard addition recovery of sulfide was 91-99%. Analysis can be carried out in about 60 minutes. The method was applied to the determination of ppb level sulfide in fresh and drinking waters.
出处
《环境污染与防治》
CAS
CSSCI
CSCD
北大核心
1990年第3期40-42,共3页
Environmental Pollution & Control
