钇（Ⅲ）量法测定有机和高分子化合物中的磷和氟

钇（Ⅲ）量法测定有机和高分子化合物中的磷和氟 DETERMINATION OF PHOSPHORUS AND FLUORINE IN ORGANIC COMPOUNDS AND POLYMERS WITH Y 3+ 谢正秋 Xie Zhengqiu first-author 本文仿效自然界的磷钇矿,探索了以Y 8+ 直接滴定和Y-EDTA间接络合滴定测定氧瓶分解后所形成的PO 4 3- 的简便方法。Y-EDTA法还可单独测定F - 和同时测定PO 4 3- 和F - .测定的误差:磷为±0.20%,氟为±0.30%。 A simple method is presented for determination of phosphorus and fluorine in organic compounds and polymers by direct titration with Y 3+ or by indirect complexometric titration with Y-EDTA after decomposing according to the usual oxygen flask procedure. Determine PO 4 - if the sample does not contain fluorine by the former and determine F-if the sample does not containphosphorus or determine the tolal content if the sample contains both by the latter. SO 4 2- does not interfere in determing F- or PO 4 3- . The interference of F- for determing PO 4 3- is eliminated by adding concentrated sulfuric acid and concentrating. It is simpler to deterlnine phosphorus with Y 3+ than with Nd 3 reported previously and is suitable for digestion decomposition determination also. The absolute error is < ±0.20% for P, and < ±0.30% for Fexcept fully fluorinated compounds. 磷氟 有机化合物 元素分析 沉淀滴定法 1987-03-01 2021-04-01 3