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A rapid method for the quantitative analysis of total acid number in biodiesel based on headspace GC technique

机译:基于顶空气相色谱技术的生物柴油中总酸值定量分析的快速方法

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摘要

The purpose of this work is to introduce a rapid and practical method for quantitatively analyzing total acid number in biodiesel by a reaction headspace gas chromatography. In this method, the carbon dioxide formed by the reaction of acidic species (i.e., fatty acids) in biodiesel and sodium bicarbonate can be measured by GC. The results showed that the complete reaction can be achieved in 25 min at 75 degrees C. The relative standard deviation of this method in total acid number determination was within 2.93%, the relative differences has been determined by comparing the total acid number obtained from this new analytical technique with the data from the reference technique (i.e., potentiometric titration), which are less than 8.05%. The reaction HS-GC technique is automated, efficient and can be a reliable tool for quantifying the total acid number in biodiesel and related research.
机译:这项工作的目的是介绍一种快速实用的方法,通过反应顶空气相色谱法定量分析生物柴油中的总酸值。在这种方法中,可以通过GC测量由生物柴油中的酸性物质(即脂肪酸)和碳酸氢钠反应形成的二氧化碳。结果表明,在75℃下25分钟内即可完成反应。该方法在总酸值测定中的相对标准偏差在2.93%以内,通过比较由此获得的总酸值确定了相对差。一种新的分析技术,其参考技术的数据(即电位滴定)小于8.05%。 HS-GC反应技术是自动化,高效的,可以作为定量生物柴油和相关研究中总酸值的可靠工具。

著录项

  • 来源
    《Fuel》 |2017年第15期|236-240|共5页
  • 作者单位

    South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou, Guangdong, Peoples R China|South China Univ Technol, Sch Mat Sci & Engn, Guangzhou, Guangdong, Peoples R China;

    South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou, Guangdong, Peoples R China;

    Hlth Supervis Bur Liaoning Prov, Shenyang, Liaoning, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Total acid number; Headspace; Gas chromatography; Biodiesel;

    机译:总酸值顶空气相色谱生物柴油;

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