| 两种滴定法测定食用油中过氧化值和酸价的不确定度评价 |
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| 引用本文： | 程慧,刘顺,关洪宣. 两种滴定法测定食用油中过氧化值和酸价的不确定度评价[J]. 食品与机械, 2022, 0(1): 71-75 |
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| 作者姓名： | 程慧 刘顺 关洪宣 |
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| 作者单位： | .黄梅县公共检验检测中心,湖北 黄冈 435501;荆州职业技术学院,湖北 荆州 434000 |
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| 基金项目： | 湖北省市场监督管理局科技计划项目(编号：Hbscjg-kj201914)；湖北省重点研发计划项目(编号：2020BCA091) |
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| 摘 要： | 目的:利用GB 5009.229及GB 5009.227的两种滴定法(自动电位滴定法和指示剂滴定法)对食用油中酸价(值)和过氧化值的测定不确定度进行分析,得出两种滴定方法测定结果的扩展不确定度。方法:采用CNAS-GL006《化学分析中不确定度的评估指南》进行不确定度评价。结果:标准溶液是影响酸价(值)和过氧化值试验结果不确定度的主要因素。结论:两种滴定法对于食用油的过氧化值和酸价(值)的影响相差较小,对于基层检测机构可根据实际情况选择合适的滴定法。
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| 关 键 词： | 滴定法 过氧化值 食用油 酸价(值) 不确定度 |
Uncertainty evaluation of two titration methods for determination peroxide and acid value in edible oil |
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| CHENG Hui,LIU Shun,GUAN Hong-xuan. Uncertainty evaluation of two titration methods for determination peroxide and acid value in edible oil[J]. Food and Machinery, 2022, 0(1): 71-75 |
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| Authors: | CHENG Hui LIU Shun GUAN Hong-xuan |
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| Affiliation: | Huangmei County Public Inspection and Testing Center, Huanggang, Hubei 435501 , China;Jingzhou Intitute of Technology, Jingzhou, Hubei 434000 , China |
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| Abstract: | Objective:Two kinds of titration methods (automatic potentiometric titration and indicator titration) of GB 5009.229 and GB 5009.227 were used to analyze the expanded uncertaintyof the determination of acid value and peroxide value in edible oil.Methods:CNAS-GL006 was used for the uncertainty component and extended uncertainty of the measurement results of the two titration methods.Results:The results showed that the standard solution was the main factor affecting the uncertainty of acid value (value) and peroxide value.Conclusion:The effects of the two titration methods on peroxide value and acid value (value) of edible oil is relatively small, and the appropriate titration method can be selected according to the actual situation for the basic testing organization. |
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| Keywords: | titration peroxidevalue edibleoil acidvalue the uncertainty |
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