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目的:通过分析潲水油提炼加工过程的特点,选择柠檬烯为特异检测指标,建立相应测定方法,用于潲水油的鉴定工作。方法:样品用正己烷溶解后蒸馏,收集蒸馏液后浓缩,通过气质联用法检测。结果:测定柠檬烯方法的线性范围均为0.005~1.0 mg/L,线性相关系数为0.9995,检出限为1.0 ng/kg,回收率分别为80.3%~89.5%。对31个油样进行检测,对潲水油的鉴别判断正确率为100%。结论:方法简便,灵敏度好,选择性好,可作为潲水油的有效鉴别手段。
OBJECTIVE: To analyze the characteristics of the extraction and processing process of the limonene oil and select limonene as the specific detection index to establish the corresponding determination method for the identification of limonene oil. Methods: The sample was dissolved in n-hexane, distilled, collected after the distillate concentration, by gas chromatography-mass spectrometry. Results: The calibration curve of limonene was linear in the range of 0.005-1.0 mg / L, with a linear correlation coefficient of 0.9995. The detection limit was 1.0 ng / kg and the recoveries were 80.3% -89.5%. The 31 oil samples were tested, the correct identification rate of water oil is 100%. Conclusion: The method is simple, sensitive and selective. It can be used as an effective means to identify the watery oil.