%0 Journal Article
%T Removal of Arsenite and Arsenate from Solid Herb Samples by Supercritical CO2 Extraction with Ion-pairing<br>超临界CO2离子缔合萃取砷的实验
%A GUAN Yan-fen
%A WANG Tao
%A <br>关艳芬
%A 王涛
%J 过程工程学报
%D 2002
%I 
%X The removal of arsenite and arsenate from solid herb sample by ion-pairing supercritical CO2 extraction was explored. As a result of the insolubility of tetrabutylammonium bromide (Bu4NBr) in supercritical CO2, the extraction efficiency of supercritical extraction with non-in-situ retreatment of ion-pairing with Bu4NBr was much better than supercritical extraction with in situ ion-pairing. For the cases of non-in-situ ion-pairing, the extraction efficiency was strongly dependent on the total amount of Bu4NBr. The optimal amount of Bu4NBr was 130.0106 mol/g solid sample under the experimental conditions.
%K ion-pairing
%K supercritical CO2
%K extraction
%K arsenite
%K arsenate
%K tetrabutylammonium bromide<br>离子缔合
%K 超临界CO2
%K 萃取
%K 砷
%K 四丁基铵
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=CC878A02F943F3B6&yid=C3ACC247184A22C1&vid=0B39A22176CE99FB&iid=38B194292C032A66&sid=DC330B09A33F1455&eid=4E6F5C60B72D9B1C&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=2&reference_num=9