Polarographic and Photometric Determination of Iodides at Trace Levels in Gallium Arsenide.

被引：0
|
作者：
Novak, Josef [1 ]
Vyhlidka, Pavel [1 ]
Flasarova, Marie [1 ]
机构：
[1] Fyzikalni Ustav CSAV, Prague, Czech, Fyzikalni Ustav CSAV, Prague, Czech
来源：
Chemicky prumysl | 1986年 / 36卷 / 04期
关键词：
IODINE COMPOUNDS - PHOTOMETRY - Applications;
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摘要：
An analytical procedure is proposed for separation and determination of iodides at trace levels in powdered and monocrystalline gallium arsenide. Separation proceeds by means of the pyrohydrolytic method in a quartz apparatus at 560 to 580 degree C in a stream of overheated steam. The released hydrogen iodide is absorbed in 1. 10** minus **3M-NaOH or in a Britton-Robinson buffer (pH 9. 3). The amount of iodides present is determined by fast differential pulse polarography. The polarographic method is more reliable and more precise than the photometry - where bromine water is used to oxidize iodide to iodine.
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页码：184 / 187
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