液芯光纤光度法在乙醇水溶液中测定铂(Ⅱ)、钛(Ⅳ)  

Determination of Trace Platinum, Titanium in Aqueous Ethanol Solution by Liquid Core Optical Fiber Spectrophotometry

作　　者：王菊芳[1] 廖远敏[1] 冯明昭[1] 夏木西卡玛尔 

机构地区：[1]中国科学院新疆化学研究所,乌鲁木齐830011

出　　处：《分析化学》1998年第1期17-20,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助课题。

摘　　要：采用氟塑料长光纤管，以４２％乙醇水溶液作液芯，组成液芯光纤，基于铂与氯化亚锡、钛与过氧化氢形成黄色络合物在乙醇水溶液中很稳定，拟定了测定铂、钛的液芯光纤光度法。该法灵敏度高，用 １ｍ长光纤作吸收池，铂的灵敏度为 ４． ８４５ Ａ／ｍｇ· Ｌ－１，钛的灵敏度为１．４１Ａ／ｍｇ· Ｌ－１（Ａ为吸光度），与常规法（１ｃｍ）比色皿相比灵敏度提高了 １００倍。该法测定了催化剂中铂，煤灰粉中钛，结果与推荐值相符。A liquid core optical fiber was constructed by filling a fluorine plastic tube with 42% ethanol solution. It was used to determine Pt and Ti, based on the formation of yellow complexex of Pt with stannous chloride and Ti with hydrogen peroxide respectively in aqueous ethanol solution. This method has a high sensitivity: for Pt is 4. 845 and for Tl is 1. 41 (A/mg·L-1). The sensitivity of liquid core optical fiber (1 m) is 100 folds as much as that of ordinary colorimetric method (1 cm cell). The method has been applied to the determination of Pt in platinum catalyst and Ti in coal ash powder. The results are in agreement with recommended values.

关 键 词：铂 钛 液芯光纤 分光光度法 LCOF 

分 类 号：O614.826[理学—无机化学] O614.411[理学—化学]