| 5 | 1/1 | 返回列表 |
| 查看: 1659 | 回復(fù): 6 | |||
| 當(dāng)前只顯示滿足指定條件的回帖,點(diǎn)擊這里查看本話題的所有回帖 | |||
[交流]
【求助】硒代硫酸鈉 sodium selenosulfate 應(yīng)如何長(zhǎng)時(shí)間保存? 已有6人參與
|
|||
| 看到很多文獻(xiàn)上說sodium selenosulfate (Na2SeSO3)需要在使用時(shí)再制備,不能長(zhǎng)久保存,有沒有清楚長(zhǎng)時(shí)間后會(huì)發(fā)生什么樣的變化?每次實(shí)驗(yàn)需要的量也就1ml左右,但是如此小的量確實(shí)不方便合成,如果每次合成的比較多,對(duì)Se也是種浪費(fèi)。 |
新蟲 (初入文壇)
|
剛剛在網(wǎng)上查到一點(diǎn)兒資料: 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 ] |
金蟲 (正式寫手)

新蟲 (初入文壇)
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 英一數(shù)一408,總分284,二戰(zhàn)真誠求調(diào)劑 +3 | 12.27 2026-03-30 | 5/250 |
|
|---|---|---|---|---|
|
[考研] 279求調(diào)劑 +12 | j的立方 2026-03-29 | 12/600 |
|
|
[考研] 一志愿北京化工大學(xué)材料與化工(085600)296求調(diào)劑 +25 | 稻妻小編 2026-03-26 | 25/1250 |
|
|
[考研] 291求調(diào)劑 +8 | HanBeiNingZC 2026-03-24 | 8/400 |
|
|
[考研] 0703 化學(xué) 求調(diào)劑,一志愿山東大學(xué) 342 分 +7 | Shern—- 2026-03-28 | 7/350 |
|
|
[考研] 化學(xué)308分調(diào)劑 +7 | 你好明天你好 2026-03-30 | 8/400 |
|
|
[考研] 環(huán)境科學(xué)與工程334分求調(diào)劑 +6 | 王一一依依 2026-03-30 | 8/400 |
|
|
[考研] 290求調(diào)劑 +3 | dfffsar 2026-03-29 | 3/150 |
|
|
[考研] 085600,專業(yè)課化工原理,321分求調(diào)劑 +5 | 大饞小子 2026-03-28 | 5/250 |
|
|
[考研] 11408軟件工程求調(diào)劑 +3 | Qiu學(xué)ing 2026-03-28 | 3/150 |
|
|
[考研] 343求調(diào)劑 +5 | 愛羈絆 2026-03-28 | 5/250 |
|
|
[考研] 304求調(diào)劑 +6 | 曼殊2266 2026-03-27 | 6/300 |
|
|
[考研] 085701環(huán)境工程,267求調(diào)劑 +16 | minht 2026-03-26 | 16/800 |
|
|
[考研] 一志愿上海理工能源動(dòng)力(085800)310分求調(diào)劑 +3 | zhangmingc 2026-03-27 | 4/200 |
|
|
[考研] 298調(diào)劑 +3 | jiyingjie123 2026-03-27 | 3/150 |
|
|
[考研] 求調(diào)劑 +3 | 劉柯@ 2026-03-24 | 4/200 |
|
|
[考研] 調(diào)劑 +4 | 柚柚yoyo 2026-03-26 | 4/200 |
|
|
[考研] 081200-11408-276學(xué)碩求調(diào)劑 +3 | 崔wj 2026-03-26 | 3/150 |
|
|
[考研] 中國科學(xué)院深圳先進(jìn)技術(shù)研究院-光纖傳感課題組招生-中國科學(xué)院大學(xué)、深圳理工大學(xué)聯(lián)培 +5 | YangTyu1 2026-03-26 | 5/250 |
|
|
[考研] 296求調(diào)劑 +4 | 汪!?! 2026-03-25 | 7/350 |
|