摘要
在不同浓度盐酸溶液中，ＣｌＯ－３、ＢｒＯ－３、ＩＯ－３可分别与硫代米蚩酮、ＮＨ４ＳＣＮ形成蓝色配合物，λｍａｘ为６２０ｎｍ。卤酸根测定的线性范围ＩＯ－３为０～３．０μｇ／１０ｍＬ、ＣｌＯ－３、ＢｒＯ－３为０～４．０μｇ／１０ｍＬ。摩尔吸光系数分别为εＣｌＯ－３＝７．６７×１０４、εＢｒＯ－３＝９．９４×１０４、εＩＯ－３＝１．４５×１０５。本法灵敏、选择性好、操作简便，已用于化学试剂中卤酸根的测定。
A spectrophotometric method for the determination of
ClO - 3,BrO - 3 and IO - 3 was developed.In a medium of HCl,XO - 3(ClO - 3,BrO - 3 or IO -
3),thio michler's ketone and SCN -can form a colored complex with the maximum absorbance
at 620nm.The molar absorptivity is ε ClO - 3 =7 67×10 4, ε BrO - 3 =9 94×10
4 and ε lO - 3 =1 45×10 5 respectively and the composition ratio of TMK∶XO - 3∶
SCN - is 3∶1∶2.The method is sensitive ,selective and simple.It can be used for determining
trace ClO - 3、BrO - 3 and IO - 3 in chemical reagents respectively .
出处
《分析试验室》
CAS
CSCD
1999年第2期54-57,共4页
Chinese Journal of Analysis Laboratory
关键词
氯酸根
溴酸根
碘酸根
测定
硫代米Chi酮
光度法
Determination of ClO - 3、BrO - 3 、 IO - 3
thio michler's ketone
spectrophotometry
