连续流动分析法测定杏仁中氰化物
胡馨月 1,吴永强 1,赖晋锋 1,林莉 1,刘娅 2
1. 泸州市疾病预防控制中心,四川泸州 646000; 2. 西南医科大学公共卫生学院,四川泸州 646000
Determination of cyanide in almond by continuous flow analysis
胡馨月 1,吴永强 1,赖晋锋 1,林莉 1,刘娅 2
1. Luzhou Center for Disease Control and Prevention, Luzhou 646000, China; 2. Public Health Department of Southwest Medical University, Luzhou 646000, China
摘要: 建立连续流动仪测定杏仁中氰化物的分析方法。将杏仁样品在超声水解后冷藏 2 h,离心 10 min,滤液经 正己烷萃取,过滤定容,加入氢氧化钠调节滤液 pH,采用连续流动仪测定。氰化物的质量浓度在 0~1.0 mg/L 范围 内与吸光度呈良好的线性关系,线性相关系数为 0.999 9,方法检出限为 0.05 mg/kg。测定结果的相对标准偏差为 0.56%~1.34%(n=6),样品加标回收率为 98.0%~104.7%。连续流动分析法测定杏仁中氰化物整体优于气相色谱法, 且在线分析时间更短,稳定性及安全性更好,适合推广应用。
Abstract:A method for the determination of cyanide in almond by continuous flow analyzer was established. The almond samples were refrigerated for 2 hours after ultrasonic hydrolysis, centrifuged for 10 minutes, the filtrate was extracted by n-hexane, filtered and fixed volume. The pH of filtrate was adjusted by adding sodium hydroxide, and the continuous flow analyzer was used to determine the results. The mass concentration of cyanide in the range of 0-1.0 mg/L had a good linear relationship with the absorbance, the linear correlation coefficient was 0.999 9, and the detection limit was 0.05 mg/kg. The relative standard deviations were 0.56%-1.34%(n=6), and the recoveries were 98.0%-104.7%. Continuous flow analysis is better than gas chromatography in the determination of cyanide in almond, and the online analysis time is shorter, the stability and safety are better, so it is suitable for popularization and application.
关键词:连续流动分析法;气相色谱法;杏仁;氰化物
Keywords:continuous flow analysis; gas chromatography; almond; cyanide
基金:2020 年食品污染物和有害因素监测中央补助项目(泸市财社 [2020]23 号)
本文引用格式:
胡馨月,吴永强,赖晋锋,等 . 连续流动分析法测定杏仁中氰化物[J]. 化学分析计量,2021,30(9):22.
Hu Xinyue,Wu Yongqiang,Lai Jinfeng,et al. Determination of cyanide in almond by continuous flow analysis[J]. Chemical Analysis and Meterage,2021,30(9):22.
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