新显色剂PMNHA的合成、分析鉴定及其在分光光度测定钒中的应用  

Synthesis, Identification of a New Chromogenic Reagent PMNHA and Its Application in Spectrophotometric Determination of Vanadium

作　　者：禹济民[1] 睦秀楣[2] 张淑英[2] 李家泽[2] 尹承烈[3] 吴光辉 樊祥熹[4] 侯华民 

机构地区：[1]中国科学院化工冶金研究所 [2]中国科学院化学研究所 [3]北京师范大学化学系 [4]首都师范大学化学系

出　　处：《光谱实验室》1998年第5期1-9,共9页Chinese Journal of Spectroscopy Laboratory

基　　金：中国科学院化工冶金研究所多相反应开放研究实验室

摘　　要：用１－甲基－２－萘甲酰基替换Ｎ－苯甲酰苯基羟胺（ＢＰＨＡ）的苯甲酰基，合成了一种新显色剂Ｎ－苯基－１－甲氧基－２－萘甲酰氧肟酸（Ｎ－ｐｈｅｎｙｌ－１－ｍｅｔｈｏｘｙ－２－ｎａｐｈｔｈｏｙｌｈｙｄｒｏｘａｍｉｃａｃｉｄ，缩写为ＰＭＮＨＡ）。根据元素分析、差热分析、质谱分析、核磁共振、红外光谱分析，确定ＰＭＮＨＡ的组成和结构为：ＯＣＨ３ＣＯＮＯＨＣ６Ｈ５。该试剂的三氯甲烷溶液能很快从２．２５—４．５０ｍｏｌ／ＬＨＣｌ中萃取钒（Ⅴ）的紫色配合物，其配合物最大吸收在５４０ｎｍ，很多外来离子，特别是大量的钛不干扰钒的测定，钒含量在０—２８μｇ·ｇ－１范围遵守比耳定律。A new chromogenic reagent N phenyl 1 methoxy 2 naphthoyl hydroxamic acid (PMNHA) was synthesized with 1 methoxy 2 naphthoyl instead of the benzoyl of N benzoyl phenyl hydroxglamile (BPHA).The composition and structure of PMNHA was determined as OCH 3 CON OH C 6H 5 , by elemental analysis, differential thermal analysis, mass spectrometric analysis, nuclear magnetic resonance spectrometry and infrared absorption spectroscopy. The chloroform solution of PMNHA extracts vanadium rapidly from 2.25? ?.50 mol/L hydrochloric acid solutions as a violet complex. The absorption maxmium of the violet complex is at 540nm. Many diverse ions, especially considerable quantity of Ti ions do not interfere with the determination of V. Beer′s law is obeyed for content of 0—28μg·g -1 . A highly selective and convenient method for spectrophotometric determination of vanadium with PMNHA is esablished.

关 键 词：钒 测定 分光光度法 显色剂 分析 合成 鉴定 应用 N-phenyl-1-methoxy-2-naphthoyl hydroxamic acid 

分 类 号：TQ421.383[化学工程] O614.511[理学—无机化学]