Analysis of metals and phosphorus in biodiesel B100 from different feedstock using a Flow Blurring® multinebulizer in inductively coupled plasma-optical emission spectrometry

Authors
Avila Orozco, Francisco David; Kovachev, Nikolay; Aguirre Pastor, Miguel Ángel; Domini, Claudia Elizabeth; Fernández Band, Beatriz Susana; Canals Hernández, Antonio
Publication Year
2014
Language
English
Format
article
Status
Published version
Description
A simple and fast method for determining the content of Na, K, Ca, Mg, P, and 20 heavy metals in biodiesel samples with inductively coupled plasma optical emission spectrometry (ICP OES) using a two-nozzle Flow Blurring® multinebulizer prototype and on-line internal standard calibration, are proposed. The biodiesel samples were produced from different feedstock such as sunflower, corn, soybean and grape seed oils, via a base catalyst transesterification. The analysis was carried out without any sample pretreatment. The standards and samples were introduced through one of the multinebulizer nozzles, while the aqueous solution containing yttrium as an internal standard was introduced through the second nozzle. Thus, the spectral interferences were compensated and the formation of carbon deposits on the ICP torch was prevented. The determination coefficients (R2) were greater than 0.99 for the studied analytes, in the range 0.21–14.75 mg kg−1. Short-term and long-term precisions were estimated as relative standard deviation. These were acceptable, their values being lower than 10%. The LOQ for major components such as Ca, K, Mg, Na, and P, were within a range between 4.9 ng g−1 for Mg (279.553 nm) and 531.1 ng g−1 for Na (588.995 nm), and for the other 20 minor components they were within a range between 1.1 ng g−1 for Ba (455.403 nm) and 2913.9 ng g−1 for Pb (220.353 nm). Recovery values ranged between 95% and 106%.
Fil: Avila Orozco, Francisco David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Kovachev, Nikolay. Universidad de Alicante; España
Fil: Aguirre Pastor, Miguel Ángel. Universidad de Alicante; España
Fil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Canals Hernández, Antonio. Universidad de Alicante; España
Subject
MULTINEBULIZER
ICP OES
INORGANIC ELEMENTAL ANALYSIS
BIODIESEL
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/30954