Some factors affecting separation and detection of amino acids by high-performance anion-exchange chromatography with integrated pulsed amperometric detection
文献类型：会议论文
| 作者 | Yu, H; Ding, YS; Mou, SF |
| 出版日期 | 2003 |
| 会议名称 | 15th International Ion Chromatography Symposium |
| 会议日期 | SEP 29-OCT 02, 2002 |
| 会议地点 | BALTIMORE, MARYLAND |
| 关键词 | mobile phase composition temperature effects detection integrated pulsed amperometric detection electrochemical detection amino acids LC |
| 英文摘要 | Some factors influencing the separation and detection of amino acids by high-performance anion-exchange chromatography with integrated pulsed amperometric detection were investigated. These factors include eluent concentration, column temperature, and detection waveform. The selectivity changes in weakly retained amino acids are slight with changing sodium hydroxide eluent concentration. When sodium acetate eluent concentration is changed, the selectivity variations between strongly retained amino acids containing two carboxyl groups and containing only one carboxyl group are obviously different. Significant but slight selectivity changes in weakly retained amino acids can be achieved through changing the column temperature. Sodium hydroxide and sodium acetate eluent concentration affect the detection of amino acids. Detection sensitivity of amino acids can be improved by increasing the concentration of sodium hydroxide and sodium acetate in a certain concentration range. The detections of amino acids at two different detection waveforms were compared. The hydroxyl amino acids can be selectively detected by choosing a modified detection waveform. The optimized gradient elution condition and column temperature for analyzing 19 amino acids were obtained. The time for the gradient elution program was 60 min. The column temperature was 35degreesC. Under the optimized conditions, detection limits for 19 amino acids were 0.15-4.52 pmol. The calibration graphs of peak area for all the analytes were linear for about three orders of magnitude. The RSDs (n = 5) of peak area were 0.6-5.6%. The determination of trace amino acid impurities in valine product is shown as an application example. (C) 2003 Elsevier Science B.V. All rights reserved. |
| ISSN号 | 0021-9673 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24795]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yu, H,Ding, YS,Mou, SF. Some factors affecting separation and detection of amino acids by high-performance anion-exchange chromatography with integrated pulsed amperometric detection[C]. 见:15th International Ion Chromatography Symposium. BALTIMORE, MARYLAND. SEP 29-OCT 02, 2002. |
入库方式： OAI收割
来源：生态环境研究中心
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