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【求助】硒代硫酸钠 sodium selenosulfate 应如何长时间保存？已有6人参与
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| 看到很多文献上说sodium selenosulfate (Na2SeSO3)需要在使用时再制备，不能长久保存，有没有清楚长时间后会发生什么样的变化？每次实验需要的量也就1ml左右，但是如此小的量确实不方便合成，如果每次合成的比较多，对Se也是种浪费。 |
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刚刚在网上查到一点儿资料： Sodium selenosulfate is an unstable inorganic selenium compound, and thus does not have a commercially available product. It was used widely for the preparation of nano-materials containing selenium. For example, sodium selenosulfate was used to prepare nano-sized copper selenide, cadmium selenide, lead selenide and the like. Generally, sodium selenosulfate was prepared by mixing elemental selenium power with sodium sulfite with a molar ratio of 1:3 to 1:6 and refluxing at a temperature of 80-100° C. for 2-4 hours. It is of prime importance for the stable time of the newly generated sodium selenosulfate that the sodium sulfite presents in excess, and the more sodium sulfite presents, the longer the stable time is. In general, the newly generated sodium selenosulfate is used immediately for the preparation of selenium nanomaterials. [ Last edited by dchost on 2010-12-7 at 18:02 ] |
2楼2010-12-07 18:01:20
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3楼2014-05-13 14:51:56
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