| 5 | 1/1 | 返回列表 |
| 查看: 1654 | 回復: 6 | |||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | |||
[交流]
【求助】硒代硫酸鈉 sodium selenosulfate 應如何長時間保存? 已有6人參與
|
|||
| 看到很多文獻上說sodium selenosulfate (Na2SeSO3)需要在使用時再制備,不能長久保存,有沒有清楚長時間后會發(fā)生什么樣的變化?每次實驗需要的量也就1ml左右,但是如此小的量確實不方便合成,如果每次合成的比較多,對Se也是種浪費。 |
新蟲 (初入文壇)
|
剛剛在網(wǎng)上查到一點兒資料: 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)

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 085600,材料與化工321分求調劑 +10 | 大饞小子 2026-03-28 | 10/500 |
|
|---|---|---|---|---|
|
[考研] 材料與化工272求調劑 +16 | 阿斯蒂芬2004 2026-03-28 | 16/800 |
|
|
[考研] 290求調劑 +3 | dfffsar 2026-03-29 | 3/150 |
|
|
[考研] 281求調劑 +4 | 亞克西good 2026-03-26 | 6/300 |
|
|
[考研] 08工科求調劑286 +3 | tgs_001 2026-03-28 | 3/150 |
|
|
[考研] 349求調劑 +6 | 李木子啊哈哈 2026-03-25 | 6/300 |
|
|
[考研] 315求調劑 +4 | akie... 2026-03-28 | 5/250 |
|
|
[考研] 壓國家一區(qū)線,求導師收留,有恩必謝! +7 | 迷人的哈哈 2026-03-28 | 7/350 |
|
|
[考研] 299求調劑 +7 | 嗯嗯嗯嗯2 2026-03-27 | 7/350 |
|
|
[考研] 0703一志愿9,初試成績:338,四六級已過,有科研經(jīng)歷,求調劑! +4 | Zuhui0306 2026-03-25 | 4/200 |
|
|
[考研] 0856,材料與化工321分求調劑 +12 | 大饞小子 2026-03-27 | 13/650 |
|
|
[考研] 339求調劑,想調回江蘇 +6 | 烤麥芽 2026-03-27 | 8/400 |
|
|
[考研] 材料292調劑 +12 | 橘頌思美人 2026-03-23 | 12/600 |
|
|
[考研] 279 分 求調劑 +4 | 睡個好覺_16 2026-03-24 | 4/200 |
|
|
[考研] 305求調劑 +5 | 哇盧卡庫 2026-03-26 | 5/250 |
|
|
[考研] 調劑推薦 +5 | 清酒714 2026-03-26 | 6/300 |
|
|
[考研]
|
鐘llll 2026-03-26 | 4/200 |
|
|
[考研] 求調劑 一志愿 本科 北科大 化學 343 +6 | 13831862839 2026-03-24 | 7/350 |
|
|
[考研] 302求調劑 +4 | 錦衣衛(wèi)藤椒 2026-03-25 | 4/200 |
|
|
[考研] 化工專碩求調劑 +3 | question挽風 2026-03-24 | 3/150 |
|