摘要
在pH2．5的氯乙酸-氯乙酸钠缓冲溶液中，表面活性剂吐温-80存在下，Ti（Ⅳ）和Sn（Ⅱ）均与三甲氧苯基荧光酮发生灵敏的显色反应，据此建立了分光光度法同时测定钢铁中钛和锡。Ti（Ⅳ），Sn（Ⅱ）络合物的最大吸收波长分别为600nm，529nm，体系的表观摩尔吸光系数分别为8．9×10^4，6．4×10^4L·mol^-1·cm^-1，络合物的组成比均为1：2。方法的线性范围对Ti（Ⅱ）为0～600μg／L，对Sn（Ⅱ）为0～700μg／L。方法已用于钢铁中钛和锡的测定，结果与认定值相符，RSD〈2．6％。
A spectrophotometric method was proposed for the determination of titanium and tin in steels based on the color reaction of Ti（Ⅳ） and Sn（Ⅱ） with trimethoxyphenlyfluorone（TMPF） as the chromogenic reagent and tween-80 as surfactant in HAc-NaAc medium at pH 2.5. The maximum absorption wavelength for Ti（Ⅳ） and Sn（Ⅱ） are 600 nm and 529 nm, respectively. Their apparent molar absorptivities are 8.9×10^4, 6.4×10^4L·mol^-1·cm^-1, respectively. The linear range of the method is 0-600μg/L for Ti（Ⅳ） and 0-700μg/L for Sn（Ⅱ）. It has been used to the determination of the titanium and tin in the steel samples with RSD〈2.6 %.
作者
朱建芳
余协瑜
ZHU Jian-fang , YU Xie-yu （ Chongqing Institute of Science and Technology, Chongqing 400050, China）
出处
《冶金分析》
CAS
CSCD
北大核心
Metallurgical Analysis
