摘要
新偶氮染料１，３－Ｎ，Ｎ′－双－［４－（４′－硝基苯偶氮）苯基］异方酸二酰胺（ＢＮＢＰＳ）的ＤＭＳＯ溶液与适量水所构成的体系是硫酸根的良好显色剂（Δλ＝１０２ｎｍ）。显色剂与硫酸根在ｐＨ４．３～７．５范围内发生反应，迅速由红色变为蓝色。λｍａｘ＝６３２ｎｍ，ε６３２＝４×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，测定硫酸根的线性范围为０～１５μｇ／１０ｍＬ。考察了常见离子的干扰情况，提供了一种新的测定硫酸根的直接分光光度法，用于测定水样中的硫酸根含量，结果满意。
A new azo dye 1,3N,N′bis4(4′nitrobenzenediazo) phenyl squariaine (BNBPS) in DMSOH2O solution is a fine colour reagent for SO2-4 (Δλ=102nm)The colour reagent reacts with SO2-4 within the pH range 4.3￣7.5 with the colour changing from red to blue rapidlyThe maximum absorption is at 632nm with a molar absorptivity of 4×104L·mol-1·cm-1The linear relationship is held in 0￣15μg/10mL SO2-4Interferences of common ions were examinedA new direct spectrophotometric method for the determination of sulfate is providedWater samples were analyzed with this method and satisfactory results were obtained
出处
《化学试剂》
CAS
CSCD
1998年第3期157-159,共3页
Chemical Reagents
基金
国家自然科学基金
关键词
硫酸根
显色剂
测定
分光光度法
BNBPS
colour reagent for anions,sulfate,direct spectrophotometry,squaric acid derivatives
