XAFS STUDIES OF SOME PRECIPITATION AND COLORATION REACTION USED IN ANALYTICAL-CHEMISTRY

被引：8
|
作者：
NUMAKO, C [1 ]
NAKAI, I [1 ]
机构：
[1] SCI UNIV TOKYO, FAC SCI, DEPT APPL CHEM, SHINJUKU KU, TOKYO 162, JAPAN
来源：
PHYSICA B | 1995年 / 208卷 / 1-4期
关键词：
D O I：
10.1016/0921-4526(94)00706-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
XAFS analysis was used to reveal local atomic environment of manganese hydroxide precipitates, the reaction products of the Winkler method which is used in the determination of dissolved oxygen in analytical chemistry. From the comparison with the XANES spectra of standard materials, it is suggested that the brown manganese hydroxide precipitates oxidized from dissolved oxygen or H2O2 contain both divalent and trivalent ions, and are not MnO(OH)(2) nor MnO2, which have been often referred as the Winkler product in general text books of analytical chemistry.
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页码：387 / 388
页数：2
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