%0 Journal Article
%T Simultaneous Determination of Amino Acids and Inorganic Cations by Ion Chromatography with Direct Conductivity Detection<br>离子色谱-直接电导法同时测定常见氨基酸和无机阳离子
%A JIAO Yang
%A YANG Peng-bo
%A LI Chun
%A CONG Wei
%A <br>焦扬
%A 杨鹏波
%A 李春
%A 丛威
%J 过程工程学报
%D 2009
%I 
%X A simple, rapid and accurate method for simultaneous determination of six amino acids (glutamic acid, alanine, methionine, leucine, phenylalanine and lysine) and five inorganic cations (Na~+, NH_4~+, K~+, Ca~(2+) and Mg~(2+)) was developed. The quantitative determination of these ions was accomplished by ion chromatography with direct conductivity detection based on their ionization in acidic medium without chemical suppression and derivatization. In a single chromatographic run, the five amino acids (glutamic acid, alanine, methionine, leucine and phenylalanine) and three inorganic cations (Na~+, NH_4~+ and K~+) were separated and determined within 12 min. The relative standard deviation (RSD, n=5) was less than 4.690%. The detection limits calculated were in the range from 0.27 to 10.34 mg/L. All the correlation coefficients (R~2) of these ions were not less than 0.9984. The recovery rates of some amino acids in isoelectric supernant of monosodium glutamate were in the range from 88.7% to 107.2%.
%K ion chromatography
%K direct conductivity detection
%K amino acid
%K inorganic cation<br>离子色谱
%K 直接电导检测器
%K 氨基酸
%K 无机阳离子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=DAC4747D6C7DD2045D9A39604CE7F982&yid=DE12191FBD62783C&vid=9CF7A0430CBB2DFD&iid=B31275AF3241DB2D&sid=09D7E2FA8227CA7B&eid=E2D70FDCD65737D1&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=18