苹果中喹啉铜残留的GC测定方法探讨

Determination of Oxine-copper Residues in Apple with GC

为了解决喹啉铜转化为8-羟基喹啉问题,以EDTA溶液为试验材料,采用气相色谱分析方法对苹果中喹啉铜残留进行研究。前处理过程中,喹啉铜转化为8-羟基喹啉,乙腈提取,用FTD检测器进行残留量分析检测。结果表明：喹啉铜在0.0605~2.42 mg/L范围内呈良好的线性关系,检出限为0.0605 mg/kg,苹果中喹啉铜添加回收率为79.8%~98.3%,RSD为1.0%~2.3%。该方法简单、可靠,可应用于水果中喹啉铜残留量的测定。

In order to solve the problem of Oxine-copper transformed into 8-Hydroxyquinoline, taking EDTAsolvent as experimental material, the GC analysis method for the Oxine-copper residual in apple was studied.Good linear correlation for Oxine- copper was found in the concentration range of 0.0605- 2.42 mg/L. Thedetection limit was 0.0605 mg/kg for Oxine-copper. The average recovery rate was 79.8%-98.3% in apple,with RSD 1.0%-2.3%（n=5）. This method is simple and reliable. It can be used for the determination of Oxine-copper residues in fruits with satisfactory results.