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首页> 外文期刊>Journal of industrial and engineering chemistry >Comparing a novel voltammetric method with a standardized method for quality control of biodiesel
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Comparing a novel voltammetric method with a standardized method for quality control of biodiesel

机译：将新型伏安法与标准化方法进行生物柴油质量控制的比较

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摘要

Biodiesel is a strong candidate to replace diesel and has its origin in renewable resources. The guarantee of biodiesel quality is a matter of utmost importance in order to take its place in the global energy matrix. One of the parameters that stand out in the monitoring of its quality is the acid number. The evaluation of this parameter is of paramount importance by considering the raw material used in the production of biodiesel up to its storage, since the presence of free fatty acids leads to the formation of deposits in the injector nozzles. The standardized method in Europe, Brazil and the USA is based on potentiometric titration, using KOH as a base. This method has some drawbacks such as long analysis time, parallel reactions with possible contaminants or additives, etc. Recently, our group proposed a method based on the voltammetric reduction of 2-methyl-1,4-naphthoquinone in the presence of acids. The generated pre-peak current is proportional to the concentration of acids in the medium. This paper reports a comparison of the conventional and our method considering analysis conditions, repeatability, limits of detection and quantification, recovery, selectivity, reproducibility and determination of acidity in various biodiesel samples. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：生物柴油是替代柴油的强大候选者，其起源于可再生资源。为了在全球能源矩阵中占据一席之地，保证生物柴油质量至关重要。在监测其质量中突出的参数之一是酸值。考虑到生物柴油生产中所使用的原材料直至其存储，对该参数的评估至关重要，因为游离脂肪酸的存在会导致在喷嘴中形成沉积物。欧洲，巴西和美国的标准化方法基于电位滴定法，以KOH为基础。该方法具有分析时间长，与可能的污染物或添加剂的平行反应等缺点。最近，我们的小组提出了一种在酸存在下基于伏安法还原2-甲基-1,4-萘醌的方法。产生的峰前电流与介质中酸的浓度成正比。本文报告了常规方法和我们方法的比较，这些方法考虑了分析条件，可重复性，检测和定量限，回收率，选择性，可再现性以及各种生物柴油样品中酸度的测定。 （C）2014韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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