论文部分内容阅读
1,10-二氮菲光度法广泛用于水中铁的测定。但水中含有干扰离子时,需用溶剂萃取分离,操作繁琐,溶剂用量大以致污染环境,其灵敏度也有限,铁含量较低时需用10cm光程光度计。负载试剂泡塑可富集分离环境样中的痕量元素,但用于萃取水中痕量铁尚未见报道。本文提出用负载TBP泡塑从硫氰酸盐介质中萃取富集分离水中痕量铁。在最佳条件下,萃取分配比可达5125,用0.24g负载TBP泡塑即可从100ml水中定量萃取微克量Fe(Ⅲ)。本法简便易行,已成功用于测定自来水、湖水、工业废水等中的痕量铁。TBP用量甚少并免用有机稀释剂,减少了污染。
1,10-diazepine spectrophotometry is widely used in the determination of iron in water. But the water contains interfering ions, the need for solvent extraction and separation, cumbersome operation, large amount of solvent used to pollute the environment, its sensitivity is limited, the lower iron content required 10cm light path photometer. Load reagent foam can be enriched in the separation of environmental samples trace elements, but for the trace of trace iron in water has not been reported. In this paper, it is proposed to extract and concentrate trace amounts of iron in thiocyanate medium with TBP foam. Under optimum conditions, the extraction and distribution ratio can reach 5125, and the quantitative extraction of micrograms of Fe (Ⅲ) from 100ml of water can be achieved by using 0.24g TBP foam. The method is simple and has been successfully used to determine trace amounts of iron in tap water, lakes and industrial wastewaters. TBP is used in small quantities and free of organic diluents, reducing contamination.