电化学还原检测油脂中叔丁基对苯二酚

Detection of tert- butylhydroquinone in oil by electrochemical reduction

采用液相色谱联用电化学还原装置检测油脂中叔丁基对苯二酚.取一定量样品加入乙腈,经超声提取后,离心过滤,上机测定.结果表明,叔丁基对苯二酚浓度在0.50～30.00 mg/L范围内线性良好,相关系数为0.998 7,方法最低检测限为0.05 mg/L,RSD为1.78％,加标回收率90.32％～ 93.40％.采用电化学还原的方式避免了油脂在存放过程中TBHQ被氧化而影响检测结果,该方法前处理简便快捷,稳定性好,结果准确可靠.

Tert - butylhydroquinone （TBHQ） in oil was detected by liquid chromatography - electrochemical reduction device. The sample was mixed with acetonitrile, extracted by ultrasound, filtrated by centrifuge and determined. The results showed good linearity for TBHQ with the concentration in the range of 0.50 - 30.00 mg/L,the correlation coefficient 0.998 7,the minimum detection limit 0.05 mg/L,RSD 1.78%, the recovery 90.32% - 93.40%. To affect the result caused by TBHQ being oxidized during storage was avoided by electrochemical reduction. This method is simple in sample pretreatment, has good stability, accuracy and reliability.