| 气相色谱法测定乙醛酸含量 |
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| 引用本文： | 杨秀平,张凤云,翟梅枝,陈凡.气相色谱法测定乙醛酸含量[J].应用化工,2003,32(5):52-53,56. |
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| 作者姓名： | 杨秀平 张凤云 翟梅枝 陈凡 |
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| 作者单位： | 西北农林科技大学,林学院,陕西,杨凌,712100 |
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| 摘 要： | 建立了气相色谱法测定乙醛酸含量的新方法。乙醛酸水溶液在80～90℃下烘干2.5h,以酸性树脂为催化剂,80℃下甲酯化1h,采用15%的EGA色谱柱,该法测定的回归曲线为Y=3290X-4.5,相关系数R=0.9987。对用乙二醛硝酸氧化法自制样品进行测定的相对标准偏差为2.32%。标准品测定的回收率97.4%以上。
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| 关 键 词： | 乙醛酸 含量测定 气相色谱 |
| 文章编号： | 1671-3206(2003)05-0052-02 |
Determination of glyoxylic acid by gas chromatography |
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| Abstract: | A new method of determining glyoxylic acid by gas chromatography has been established. The solution of glyoxylic acid was dried in 80 ～ 90 ℃ for 2.5 h, methyl esterified in 80 ℃ by acid resin as catalys. 15% EGA chromatography column was used. Regression curve of the method is Y=3 290X-4.5, related coefficiency, R=0.998 7,relatively standard deviation of determining sample self prepared by glyoxal nitric acid oxidation process is 2.32%, recovery rate of pure product is over 97.4%. |
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| Keywords: | gas chromatography glyoxylic acid content determining |
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