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Validation of a New Analytical Method for the Measurement of Free Fatty Acids in Biodiesel

机译:一种新的测定生物柴油中游离脂肪酸的分析方法的验证

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摘要

International and Brazilian standards have in common the acid number as the main qualification parameter for biodiesel. Free fatty acids lead to engine corrosion and contribute to the formation of gum. The analytical methods specified for analysis are based on colorimetric and potentiometric titrations, which are characterised by lack of selectivity. This article proposes a new method based on the electrochemical reduction of quinones in the presence of the free fatty acids found in biodiesel on the glassy carbon electrode surface in the range of 0.4V to -0.65V versus Ag/AgCl/Cl~- (3molL~(-1)). The proposed method was validated.
机译:国际标准和巴西标准共同地将酸值作为生物柴油的主要鉴定参数。游离脂肪酸会导致发动机腐蚀,并有助于形成口香糖。指定用于分析的分析方法基于比色法和电位滴定法,其特征是缺乏选择性。本文提出了一种新方法,该方法基于存在于生物柴油中的碳纤维表面上存在的生物柴油中存在的游离脂肪酸(在相对于Ag / AgCl / Cl〜-(3molL)的0.4V至-0.65V范围内,电化学还原醌〜(-1))。所提出的方法得到了验证。

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