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食品研究与开发:2023,44(5):171-176
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全自动蒸馏-流动分析仪联用测定木薯粉中氰化物
(1.天津大学精密仪器与光电子工程学院,天津 300072;2.天津市生物医学工程与检测技术重点实验室,天津 300072;3.军事医学研究院作业医学与环境医学研究所,天津 300054;4.北京海光仪器有限公司,北京 100193)
Determination of Cyanide in Cassava Powder by Automatic Distillation-Flow Analysis
(1.School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;2.Tianjin Key Laboratory of Biomedical Engineering and Testing Technology,Tianjin 300072,China;3.Institute of Occupational Medicine and Environmental Medicine,Academy of Military Medicine,Tianjin 300054,China;4.Beijing Haiguang Instrument Co.,Ltd.,Beijing 100193,China)
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投稿时间:2022-10-12    
中文摘要: 为更加高效地测定食品中的氰化物,该试验建立全自动智能化水蒸气蒸馏仪(automatic intelligent steam distillation,AISD)和氰化物连续流动分析仪联用法测定木薯粉中氰化物含量的方法。结果表明:在0~200 μg/L的氰化物浓度范围内,该方法线性度良好,相关系数为0.999 5。当选择样品为5 g、蒸馏后定容体积为50 mL时,木薯粉样品中氰化物的方法检出限(信噪比S/N=3)为0.013 mg/kg,定量限(信噪比S/N=10)为0.043 mg/kg。该方法精密度(relative standard deviation,RSD)为2.5%~6.7%,加标回收率为93.72%~103.33%。与 GB 5009.36—2016《食品安全国家标准食品中氰化物的测定》中的第一法进行对比,配对t检验的结果为t=2.233 27,p=0.075 85(p>0.05),说明在0.05水平下,该方法与GB 5009.36—2016没有显著性差异。该方法重复性好、准确度高、分析速度快、耗时短。因此,可以用于批量检测木薯粉中氰化物。
中文关键词: 蒸馏  连续流动分析  氰化物  木薯粉  精密度
Abstract:In order to efficiently determine cyanide in food,a method for the determination of cyanide content in cassava powder by automatic intelligent steam distillation(AISD)device combined with cyanide continuous flow analyzer was established.The results showed that the linearity of the method was good in the range of cyanide concentration from 0 to 200 μg/L,and the correlation coefficient was 0.999 5.The limit of detection(S/N=3)and limit of quantification(S/N=10)of cyanide in cassava powder samples were 0.013 mg/kg and 0.043 mg/kg when the sample was 5 g and the constant volume was 50 mL after distillation.The relative standard deviation(RSD)of the method was 2.5%-6.7%,and the recovery rate was 93.72%~103.33%.Compared with the first method in the national standard GB 5009.36—2016“Determination of Cyanide in National Standard Food Safety”,the results of paired t-test were t=2.233 27 and p=0.075 85(p>0.05),indicating that at the level of 0.05,there was no significant difference between the two groups of data.Due to the good repeatability,high accuracy,fast analysis speed,and less time consumption,this method can be used for the determination of cyanide in cassava powder in batches.
文章编号:202305025     中图分类号:    文献标志码:
基金项目:国家自然科学基金(42177439)
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