CAJ | 학술논문

提出了一种利用已知过量的亚硝酸盐与氨基磺酸反应,对氨基磺酸进行分光光度测定的方法.未反应的亚硝酸根采用其与对硝基苯胺及N-(1-萘基)乙二胺二盐酸盐(NEDA)之间的重氮偶合反应来测定.所生成的偶氮染料的最大吸收波长为545 nm,实测摩尔吸光度为6.1×100 L/(mol·cm).该方法可用于测量总体积为25 mL的样品中0～25 μg的氨基磺酸.当样本数为10时,测定15μg氨基磺酸的相对标准偏差为2%.将该方法用于测定镍、铅、铁、钌、锢等金属的氨基磺酸盐电镀液废水中氨基磺酸的含量,其结果采用加标回收率方法进行了验证.
제출료일충이용이지과량적아초산염여안기광산반응,대안기광산진행분광광도측정적방법.미반응적아초산근채용기여대초기분알급N-(1-내기)을이알이염산염(NEDA)지간적중담우합반응래측정.소생성적우담염료적최대흡수파장위545 nm,실측마이흡광도위6.1×100 L/(mol·cm).해방법가용우측량총체적위25 mL적양품중0～25 μg적안기광산.당양본수위10시,측정15μg안기광산적상대표준편차위2%.장해방법용우측정얼、연、철、조、고등금속적안기광산염전도액폐수중안기광산적함량,기결과채용가표회수솔방법진행료험증.
A proposed spectrophotometric method for the determination of sulfamic acid involves reaction of sulfamic acid with known excess of nitrite. The unreacted nitrite is determined by diazo coupling reaction involving p-nitroaniline and N-(1-naphthyi)ethylenediamine dihydrochloride [NEDA]. The absorption maximum (λmax) for the formed azo dye is at 545 nm and the calculated molar absorptivity is sulfamic acid in the range of 0-25 lag in an overall volume of 25 mL, and the relative standard deviation is 2% for n = 10at 15 μg level of sulfamic acid. The developed method was applied to the determination of sulfamic acid in the effluents of nickel, lead, iron, ruthenium and indium sulfamate electroplating baths. The results obtained were validated by recovery studies of added sulfamic acid.