Journal
TALANTA
Volume 135, Issue -, Pages 133-137Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2014.12.014
Keywords
Biodiesel; Biofuel; Calcium; Magnesium; SWIA; Determination; Spectrophotometric; Metal
Categories
Funding
- Russian Foundation for Basic Research [13-03-00031-a, 14-03-31092 mol_a]
Ask authors/readers for more resources
An easily performed stepwise injection (SWIA) procedure based on on-line dilution of biodiesel samples and the formation of color-forming calcium (II) and magnesium (II) complexes with Eriochrome Black T (EBT) in an organic medium followed by spectrophotometric determination is presented. A sample of biodiesel was placed at the bottom of a mixing chamber connected to an automatic SWIA manifold. Isopropyl alcohol was used as the diluent under bubbling. The solution was submitted for on-line spectrophotometric simultaneous determination of calcium and magnesium based on the classic leastsquare method. The linear ranges were from 2 to 20 mu g g(-1) and from 1.2 to 12 mu g g(-1), and the detection limits, calculated as 3 s for a blank test (n=5), were found to be 0.6 mu g g(-1) for calcium and 0.4 mu g g(-1) for magnesium. The sample throughput was 30 h(-1). The method was successfully applied to the analysis of biodiesel samples. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available