Simultaneous determination of dimethylamine,trimethylamine and trimethylamine-n-oxide in aquatic products extracts by ion chromatography with non-suppressed conductivity detection |
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Authors: | Feng Li Hong-ying Liu Chang-hu Xue Xue-qian Xin Jie Xu Yao-guang Chang Yong Xue Li-ang Yin |
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Institution: | 1. College of Food Science and Engineering, Ocean University of China, No. 5, Yu Shan Road, Qingdao, Shandong Province 266003, China;2. College of Food Science and Technology, Agricultural University of Hebei, Baoding, Hebei Province 071001, China |
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Abstract: | An ion chromatography method with non-suppressed conductivity detection was developed for the simultaneous determination of dimethylamine (DMA), trimethylamine (TMA) and trimethylamine-n-oxide (TMAO) in aquatic products. They were separated by means of cation-exchange chromatography using a 3.0 mmol/L methanesulfonic acid solution as eluent and an IonPac CS17 column (250 mm × 4 mm i.d.) as the separation column. Detection limits of dimethylamine, trimethylamine and trimethylamine-n-oxide were 0.06, 0.08 and 0.10 mg/L, respectively. The relative standard deviations (RSDs) of peak area were less than 3.53%. The recoveries were between 93.7% and 104.1%. Unlike traditional methods, this validated method is inexpensive and stable. |
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Keywords: | Non-suppressed conductivity detection Ion chromatography DMA TMA TMAO Aquatic products |
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