Determination of biogenic amines by low-cost chip electrophoresis

来源 :第八届全国微全分析系统学术会议、第三届全国微纳尺度生物分离分析学术会议暨第五届国际微化学与微系统学术会议 | 被引量 : 0次 | 上传用户:G00G01
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  Trace amounts of biogenic amines exist in many foods,but higher levels of them may cause a range of adverse consequences to the eaters,such as headache,nausea,heart palpitations and stomach cramps,even death [1].Certain biogenic amines are used as indicators of freshness of meat.Exploring rapid determination method for biogenic amines is necessary.Microchip electrophoresis is a technique with advantages of low sample consumption and fast analysis speed [2],can be an ideal way for rapid analysis,however,its real application is still rather limited.In this abstract,chip electrophoresis based on low-cost cyclic olefin copolymer (COC) chips and laser induced fluorescence detection (LIF) for the determination of FITC labeled biogenic amines (tryptamine,putrescine,cadaverine) in meat was demonstrated.A series of hydroxyl-group-rich molecules,ethylene glycol,glycerol,polyvinyl alcohol and HPC (hydroxypropyl cellulose) were investigated as buffer additives.The results showed that the molecular weight of the additives was critical; HPC gave the best performance with regard to either separation efficiency or repeatability.Under selected conditions,all biogenic amines could be separated with within 2 min (Figure 1).The limits of detection (S/N = 3) were in the range of 2.47 - 16.8 nM.The linear range (r>0.99) of the calibration curves was upto 5000 nM.Standard deviation of the peak areas and peak times were less than 4.0% and 2.1% respectively.This method has been successfully used for the analysis of tryptamine,putrescine,cadaverine in carp and snakefish samples (Figure 2),the recoveries of standard addition were 83.6%-112.7%.These results show a good prospect of application of the low-cost chip electrophoresis in food safety analysis.
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