【摘要】 本文研究了 In(Ⅲ)-BPR-Zeph-SCMC 体系的显色反应。在 pH=4.0的乙酸-乙酸铵缓冲溶液中,在 SCMC存在下,In(Ⅲ)与 BPR 和 Zeph 形成蓝紫色胶束络合物.最大吸收波长为640nm.其摩尔吸光系数ε640nm=8.0×10~4.其组成:In(Ⅲ):BPR:Zeph=1:2:2.在0—50μg In/50ml 范围内符合比尔定律。初步讨论了胶束络合物增敏机理.试用于纯铅和锡中微量铟的测定,结果尚称满意.更多还原

【Abstract】 In acetic acid-ammonium acetate buffer solution of pH 4,indium(Ⅲ)forms a blue-violet complex with BPR and Zeph in the presence of SCMC.The maximum absorbance of the system was measured at 640 nm,and its molar absorptivity is 8×10~4/(mol.cm).The mole ratio of indium,BPR and Zeph is 1:2:2.A linear calibration curve is obtained for 0—50μg of indium in 50 ml.The mechanism of increasing sensitivity has been discussed preliminarily.The results are satisfactory for the microdetermination of indium in pure lead and tin.更多还原