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Molecular absorption spectrophotometric method for the determination of phosphorus in biodiesel

机译:分子吸收分光光度法测定生物柴油中的磷

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摘要

A molecular absorption method is proposed for the determination of phosphorus in biodiesel. The samples are mineralized using an ashing procedure at 550 °C followed by dissolution of the residue. The analytical procedure is based on the formation of a blue molybdenum complex, l-amino-2-naph-thol-4-sulfonic acid is used as reducing agent. The method was applied to biodiesel samples prepared from soy, canola and sunflower oils and from bovine fat. The limit of detection is 0.57 mg P kg~(-1) and the limit of quantification is 1.7 mg P kg~(-1). The observed mean relative standard deviation is about 5%. The simplicity of the procedure added to its precision, accuracy and low cost suggest that it is an excellent option for the determination of phosphorus in biodiesel.
机译:提出了一种分子吸收法测定生物柴油中的磷。使用灰化程序在550°C下将样品矿化,然后溶解残留物。该分析程序基于蓝色钼配合物的形成,将1-氨基-2-萘酚-4-磺酸用作还原剂。该方法适用于由大豆油,低芥酸菜子油和葵花籽油以及牛脂制得的生物柴油样品。检出限为0.57 mg P kg〜(-1),定量限为1.7 mg P kg〜(-1)。观察到的平均相对标准偏差约为5%。该过程的简单性,精确度,准确性和低成本的增加表明,它是测定生物柴油中磷的极佳选择。

著录项

  • 来源
    《Fuel》 |2011年第11期|p.3485-3488|共4页
  • 作者单位

    University of Campinas, Institute of Chemistry, P.O. Box 6154, 13083-970 Campinas, SP, Brazil;

    University of Campinas, Institute of Chemistry, P.O. Box 6154, 13083-970 Campinas, SP, Brazil;

    University of Campinas, Institute of Chemistry, P.O. Box 6154, 13083-970 Campinas, SP, Brazil;

  • 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

    biodiesel; fats; vegetable oils; phosphorus; spectrophotometry;

    机译:生物柴油脂肪植物油;磷;分光光度法;

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