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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of trace sulfur in biodiesel and diesel standard reference materials by isotope dilution sector field inductively coupled plasma mass spectrometry

Full text
Author(s):
Amais, Renata S. [1] ; Long, Stephen E. [2] ; Nobrega, Joaquim A. [1] ; Christopher, Steven J. [2]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Grp Appl Instrumental Anal, BR-13560 Sao Carlos, SP - Brazil
[2] NIST, Div Chem Sci, Charleston, SC - USA
Total Affiliations: 2
Document type: Journal article
Source: Analytica Chimica Acta; v. 806, p. 91-96, JAN 2 2014.
Web of Science Citations: 18
Abstract

A method is described for quantification of sulfur at low concentrations on the order of mg kg(-1) in biodiesel and diesel fuels using isotope dilution and sector field inductively coupled plasma mass spectrometry (ID-SF-ICP-MS). Closed vessel microwave-assisted digestion was employed using a diluted nitric acid and hydrogen peroxide decomposition medium to reduce sample dilution volumes. Medium resolution mode was employed to eliminate isobaric interferences at S-32 and S-34 related to polyatomic phosphorus and oxygen species, and sulfur hydride species. The method outlined yielded respective limits of detection (LOD) and limits of quantification (LOQ) of 0.7 mg kg(-1) S and 2.5 mg kg(-1) S (in the sample). The LOD was constrained by instrument background counts at S-32 but was sufficient to facilitate value assignment of total S mass fraction in NIST SRM 2723b Sulfur in Diesel Fuel Oil at 9.06 +/- 0.13 mg kg(-1). No statistically significant difference at a 95% confidence level was observed between the measured and certified values for certified reference materials NIST SRM 2773 B100 Biodiesel (Animal-Based), CENAM DRM 272b and NIST SRM 2723a Sulfur in Diesel Fuel Oil, validating method accuracy. Published by Elsevier B.V. (AU)

FAPESP's process: 10/17387-7 - Assessment of spectroanalytical techniques and sample preparation procedures for the determination of sulfur in biodiesel and diesel blends
Grantee:Renata Stábile Amais
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 12/00920-0 - Evaluation of inductively coupled plasma high resolution mass spectrometry for sulfur determination in biodiesel and blends
Grantee:Renata Stábile Amais
Support Opportunities: Scholarships abroad - Research Internship - Doctorate