高强脉冲电场强化甘氨酸铜螯合反应  

Effect of PEF treatments on enhancing the chelation reaction between glycine and copper sulfate

作　　者：于倩[1] 曾新安[1] 

机构地区：[1]华南理工大学轻工与食品学院,硕士研究生广东广州510641

出　　处：《食品与发酵工业》2013年第10期69-72,共4页Food and Fermentation Industries

基　　金：国家自然科学基金(2107608);广东省科技攻关项目(2012A020200002;2012A020100005)资助

摘　　要：通过考察甘氨酸和硫酸铜在不同条件下的螯合反应程度,研究了高压脉冲电场(PEF)对甘氨酸和硫酸铜的螯合反应的影响,并初步探索脉冲电场对螯合反应的影响机理。结果表明:未加PEF时,最佳的螯合条件是螯合比2∶1,pH 7.0,温度50℃;当施加20 kV/cm以上的PEF时,相同时间内甘氨酸铜的生成量显著增大,用40kV/cm PEF处理50 min后,甘氨酸铜的产量较未处理样提高了89%。红外光谱分析结果表明经PEF处理生成的甘氨酸铜产物更为稳定。因此,PEF是一种有效提高螯合反应效率的手段。The effect and mechanism of pulsed electric field （PEF） treatment on the chelation reaction between glycine and copper sulphate was investigated. The optimum reaction condition without PEF treatment was pH 7.0, at 50℃ , the chelation ratio of glycine to copper was 2 ： 1. PEF treatment over 20 kV/cm led to a noticeable increase in the yield of biscopper in a certain period of time. It was found that 89% increase of the biscopper yield by PEF at 40 kV/cm for 50 min. Fourier transform infrared spectroscopy （FTIR） analysis showed that the chelate prepared by PEF treatment was much more stable than the untreated one. In conclusion, PEF could be an alternative method to enhance the chelation reaction.

关 键 词：高强脉冲电场(PEF) 强化反应 甘氨酸铜 螯合反应 

分 类 号：TS201.2[轻工技术与工程—食品科学]