摘要
在溴和甲酸钠存在下，碘（Ⅰ－）与淀粉作用生成蓝色物质。本文根据着色溶液吸光度（Ａ），入射波长（λ）及显色物质浓度（Ｘ）的相互关系研究天然水中测定碘的主次波长新光度法。该法具有较高分析精密度，检出限较单波长比色法低。样品分析结果表明：ＲＳＤ≤４．３％，加标回收率为９７％～１０７％。方法检出限０．００１μｇ／ｍＬ。
In both bromine(Br_2) and sodium formate(HCOONa) solution iodine can react with amylodextrin to form a blue substance. In this paper new analytical method as primary-secondary wavelengthes Spectro-photometry was studied to determine trace of Ⅰ￣- in natural water.The method is simple and the calculated curve is very stable. The results showed that RSD≤4.3% and the detection limit is 0 .001 mg/L and the recovery rate is 97%～107%. It is suitable for analyses of drinking water, lake water and other natural water.
出处
《分析测试学报》
CAS
CSCD
1994年第2期83-86,共4页
Journal of Instrumental Analysis
关键词
主次波长
碘
天然水
比色法
Primary-Secondary wavelengthes, Iodine (Ⅰ￣-), Natural water.
