DETERMINATION OF BIODIESEL CONTENT IN DIESEL USING THE COLORIMETRIC ASSAY FOR HYDROXAMIC ACID

被引：4

作者：

da Costa, Roberta P. M. ^{[1
]}

Khalil, Thaiane C. ^{[1
]}

dos Santos, Amanda P. F. ^{[1
]}

de Andrade, Debora F. ^{[2
]}

d'Avila, Luiz A. ^{[1
,3
]}

机构：

[1] Univ Fed Rio de Janeiro, Escola Quim, Lab Combustiveis & Derivados Petroleo, BR-21941909 Rio De Janeiro, RJ, Brazil

[2] Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Analit, BR-21941909 Rio De Janeiro, RJ, Brazil

[3] Univ Fed Rio de Janeiro, Dept Proc Organ, BR-21941909 Rio De Janeiro, RJ, Brazil

来源：

QUIMICA NOVA | 2015年 / 38卷 / 04期

关键词：

biodiesel; hydroxamic acid; colorimetric assay; ACTIVATED ACYL GROUPS; HYDROXYLAMINE;

D O I：

10.5935/0100-4042.20150039

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The aim of this paper was to use colorimetric assays for hydroxamic acid to quantify the biodiesel content in diesel and compare it with the traditional method (infrared spectroscopy, using the EN 14078 method). Samples were prepared from B2 to B10 with two kinds of diesel - S500 (red) and S50 (yellow) - to obtain two calibration curves. Through statistical methods it was shown that the slopes of the straight lines obtained for the different types of diesel were the same. Thus, the type of diesel did not influence the results of the colorimetric assay for hydroxamic acid. Real samples collected from gas stations were analyzed by both methods (colorimetry and EN 14078). By applying Student's t-test it was concluded that the methods could be considered statistically equivalent. Therefore, it was confirmed that the colorimetric assay for hydroxamic acid is suitable for detecting and quantifying the content of biodiesel in biodiesel/diesel blends and can also be easily adapted to field analyses.

引用

页码：563 / 569

页数：7

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[2]

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