Origin of the thermal desorption peaks of gases in NaI above 180°C

Origin of the thermal desorption peaks of gases in NaI above 180°C
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180°C 以上 NaI 中气体热解吸峰的起源

DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
O. Shishkin
O. Shishkin
中科院分区:
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文献类型:
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作者:
D. Sofronov;K. Kudin;A. Voloshko;A. M. Kudin;O. Shishkin

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我们分析了 NaI 中高于结晶水合物 NaI·2H2O 温度稳定范围的水解吸峰的来源。 t ≥ 180°C 时的两个水解吸峰表明是由基于羟基的水复合物分解引起的。压力-温度曲线中的此类峰值为检测原材料中的羟基提供了有效且灵敏的工具。长时间室温脱水后,不会出现此类峰。微波干燥可加速脱水过程。
We analyze the origin of the water desorption peaks in NaI above the temperature stability range of the crystalline hydrate NaI · 2H2O. The two water desorption peaks at t ≥ 180°C are shown to arise from the decomposition of aqua complexes based on hydroxyl groups. Such peaks in the pressure-temperature curve provide an effective and sensitive tool for detecting OH groups in raw materials. After prolonged room-temperature dehydration, no such peaks emerge. The dehydration process can be accelerated by microwave drying.