%0 Journal Article
%T Determination of sulfide in gourmet powder by anion exchange chromatography with pulsed amperometric detection<br>阴离子交换色谱-脉冲安培法检测味精中的硫化物
%A LI Renyong
%A LIANG Lina
%A LI Jing
%A <br>李仁勇
%A 梁立娜
%A 李静
%J 色谱
%D 2010
%I 
%X A chromatographic method was developed for the determination of sulfide in gourmet powder. The samples were dissolved in 2 g/L sodium hydroxide solution directly, and filtrated with a 0.22 μm nylon membrane. The sulfide and other anions such as high concentration of glutamate were separated well in 6 min by an IonPac AS7 Anion Exchange column (250 mm×4 mm). A mixed solution of 100 mmol/L sodium hydroxide, 500 mmol/L sodium acetate and 0.5% ethylenediamine was used isocratically as the mobile phase. The detection limit of the sulfide was 0.3 μg/L at 25 μL injection (S/N=3). Moreover, the method had a wide linear range (0.001~1 mg/L) and satisfactory recovery (94.2%~99.0%). The method was applied in the determinations of the sulfide in 99% monosodium glutamate, special delicious monosodium glutamate and salted monosodium glutamate samples. The method is simple, fast and good in separation performance, and has high selectivity and sensitivity.
%K ion chromatography (IC)
%K anion exchange
%K pulsed amperometric detection
%K sulfide
%K gourmet powder<br>离子色谱法
%K 阴离子交换
%K 脉冲安培检测
%K 硫化物
%K 味精
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=2543AAB6DEDA2C84E4461BA88F422473&yid=140ECF96957D60B2&vid=D3E34374A0D77D7F&iid=59906B3B2830C2C5&sid=E2D70FDCD65737D1&eid=ADA74056AD01F4A8&journal_id=1000-8713&journal_name=色谱&referenced_num=0&reference_num=0