| 色差加水法测定玉米脂肪酸值研究 |
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| 引用本文： | 崔健,张继双,薄静会,邱丽娜.色差加水法测定玉米脂肪酸值研究[J].粮食科技与经济,2014(4):35-36. |
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| 作者姓名： | 崔健 张继双 薄静会 邱丽娜 |
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| 作者单位： | 昌图辽宁省粮食质量监测站,辽宁铁岭112599 |
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| 摘 要： | 在常温下用无水乙醇提取玉米中游离脂肪酸,用氢氧化钾标准滴定液滴定,进行脂肪酸值的测定.结果表明,3个不同脂肪酸值的玉米样品13次平行测试的极差最大为1.53 mgKOH/100g,小于重复性临界值2 mgKOH/100g,标准偏差在0.39～0.60.利用该方法对35个样品进行检测,其结果与国标方法平均值之差大于重复性临界值2 mgKOH/100g,建议对国标进行修订.
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| 关 键 词： | 玉米 脂肪酸值 滴定终点 |
Study on Determining Fatty Acid Value in Maize by Chromatism-water Method |
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| Cui Jian,Zhang Jishuang,Bo Jinghui,Qiu Lina.Study on Determining Fatty Acid Value in Maize by Chromatism-water Method[J].Grain Technology and Economy,2014(4):35-36. |
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| Authors: | Cui Jian Zhang Jishuang Bo Jinghui Qiu Lina |
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| Institution: | (Changtu Liaoning Province Grain Quality Inspection Station, Tieling, Liaoning 112599) |
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| Abstract: | The method to determine fatty acid value in maize by judging the titration end point is set up.It can be used m deter- mining dissociated fatty acid extracted from maize in normal temperature with the help of anhydrous ethanol and KOH so- lution.The result shows the limit error of three kinds of maize samples which are different in fatty acid content is as follows （during 13 times tests） ： maximum error： 1.53 mgKOH/100g〈iterative threshold value ： 2 mgKOH/100g.standard deviation： 0.39-0.60（〈1.0）.The result of all the 35 samples are transcend 2 mgKOH/100g compared with the detection result based on the national standard method.So the national standard should be revised as soon as possible. |
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| Keywords: | maize fatty acid value titration end point |
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