蟒蛇油中铁锰铜锌的测定与去除研究

Study on determination and removal of Fe, Mn, Cu and Zn in python oil

摘要: 采用火焰原子吸收光谱法测定了蟒蛇油中Fe、Mn、Cu、Zn等4种金属元素的含量。利用金属离子螯合剂(柠檬酸、抗坏血酸、磷酸二氢钾)螯合萃取去除蟒蛇油中金属元素,抑制蟒蛇油自动氧化作用,以延长蟒蛇油的贮存期、降低其腥臭味。研究结果表明,Fe、Mn、Cu、Zn等4种金属元素的去除率分别为65.07%、26.61%、11.82%、14.76%。金属元素的去除,有效地抑制了蟒蛇油的自动氧化作用,提高了蟒蛇油的氧化稳定性,使蟒蛇油在20℃条件下的预期贮藏时间延长了32~48d。

Abstract: Four metal elements ( Fe, Mn, Cu and Zn) in python oil was determined by means of flame atomic absorption spectrometry.The chelated metal elements were separated and removed finally by using sequestering agents ( citric acid, ascorbic acid, potassium dihydrogen phosphate) .The purpose of the removal was to study the inhibition influence on auto-oxidation of the python oil and prolong the storage time of python oil and reduce the stench.The experiment results showed that the removal percentage of these four metal elements were as follows:Fe was 65.07%, Mn was 26.61%, Cu was 11.82%, Zn was 14.76%.The auto-oxidation of the python oil was inhibited effectively and the oxidation stability was improved through the removal of it.Finally the expected storage time of python oil was prolonged for 32⁴8 days at the temperature of 20℃.