Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10560472 | Talanta | 2011 | 5 Pages |
Abstract
We report here, for the first time, application of batch injection analysis (BIA) with amperometric detection for determination of the phenolic antioxidant butylated hydroxyanisole (BHA) in biodiesel. A sample plug was directly injected onto a boron-doped diamond electrode immersed in 50% v/v hydroethanolic solution with 0.1 mol Lâ1 HClO4 using an electronic micropipette. Importantly, the only preparation step required for biodiesel analysis is dilution in the same hydroethanolic electrolyte solution. Our proposed method has several advantages for routine biodiesel analysis, including: a low relative standard deviation between injections (0.29%, n = 20), high analytical frequency (120 hâ1), adequate recovery values (93-101%) for spiked samples, satisfactory accuracy (based on comparative determinations by high-performance liquid-chromatography), and a low detection limit (100 ng of BHA per g of biodiesel). Finally, our method can be adapted for the determination of other antioxidants in biodiesel samples.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Thiago Faria Tormin, Denise Tofanello Gimenes, Eduardo Mathias Richter, Rodrigo Alejandro Abarza Munoz,