摘要
在 pH 1 6 0～ 2 10的氯乙酸缓冲溶液中和有溴化十六烷基三甲基铵 (CTMAB)存在下 ,锡 (IV)与溴邻苯三酚红 (BPR)形成 1∶2的红色络合物。该络合物的最大吸收波长为 5 30nm ,当有亚氨基二乙酸、磺基水杨酸或柠檬酸存在时 ,显色反应灵敏度明显提高。利用Sn(IV) -柠檬酸 -BPR -CTMAB显色体系的分光光度法 ,对锰青铜合金和海军黄铜中锡的测定 ,结果令人满意。
In pH 1 60～2 10 chloroacetic acid buffer solution and in the presence of cetyltrimethylam-monium bromide (CTMAB), Tin(IV) forms a 1∶2 red complex with bromopyrogallol red (BPR) The maximum absorption of the complex is at 530 nm In the presence of iminodiacetic acid, sulfosalicylic acid or citric acid, the sensitivity of color reaction of Tin(IV) with BPR rise obviously Tin in manganese bronze and naval brass has been determined by spectrophotometric method of Sn(IV)-citric acid-BPR-CTMAB color system with satisfactory results
出处
《广州化工》
CAS
2002年第3期29-32,共4页
GuangZhou Chemical Industry
