离子色谱法同时测定水源水中的5种生物胺

建立了离子色谱(IC)同时测定水源水中5种生物胺(BA)(腐胺、尸胺、组胺、亚精胺和精胺)的方法。样品经0.45 μm水膜过滤后,用TSK-GEL SuperIC阳离子交换柱(150 mm×4.6 mm)分离,以甲磺酸水溶液为流动相梯度淋洗,流速为1.0 mL/min,非抑制电导检测,进样量为100 μL。实验结果表明,5种生物胺可以实现基线分离;在1.0～30.0 mg/L范围内,其峰面积与质量浓度之间的线性关系良好;保留时间的相对标准偏差(RSD)均不高于0.02%,峰面积的RSD小于2.08%;加标回收率为96.0%～107.0%。该法简便、快捷、准确,可以用于水源水中腐胺、尸胺、组胺、亚精胺和精胺5种生物胺的同时测定。

Determination of five biogenic amines in source water by ion chromatography

An ion chromatographic (IC) method was developed for the separation of five biogenic amines (BAs), including putrescine, cadaverine, histamine, spermidine and spermine, in source water. The sample was separated on a TSK-GEL SuperIC cation exchange column (150 mm×4.6 mm) after filtering treatment by 0.45 μm inorganic membrane. Methanesulfonic acid was used as eluent for concentration gradient elution at the rate of 1.0 mL/min. The injection volume was 100 μL and the BAs were detected by a non-suppressed conductivity detector. The result showed that the baseline separation was obtained for the 5 kinds of BAs. The linear relationships between the concentration and the peak area were obtained in the concentration range of 1.0~30.0 mg/L. The relative standard deviations (RSDs) of retention time and peak area were no more than 0.02% and 2.08%, respectively. The recoveries were from 96.0% to 107.0%. The method is simple, rapid, highly sensitive and with good repeatability. It could be used for the determination the BAs in the source water.