TY - JOUR
T1 - Antimony speciation in road dust and urban particulate matter in Valparaiso, Chile
T2 - Analytical and environmental considerations
AU - Quiroz, Waldo
AU - Cortés, Marisol
AU - Astudillo, Francisco
AU - Bravo, Manuel
AU - Cereceda, Francisco
AU - Vidal, Víctor
AU - Lobos, María Gabriela
N1 - Funding Information:
The authors gratefully acknowledge the financial support of Chilean Government , (project FONDECYT 11080084 ).
PY - 2013/9
Y1 - 2013/9
N2 - In this study we develop an analytical methods for the determination of total Sb, Sb(V) and Sb(III) in road dust and airborne particulate matter (APM) by HPLC-HG-AFS. For total Sb determination, samples were digested with 6. mL of HNO3 and 2. mL of HBF4 in closed microwave digestion system at 200. °C in 30. min, trueness was determined by using APM certified reference material NIST 1648a. For Sb(V) and Sb(III) determination, oxalic acid 100. mmol. L-1 in 1% w/v ascorbic acid at 70. °C in closed vessel microwave extraction was chosen as extraction procedure. Analytical methods were applied to airborne particulate matter (< 10μm), and road dust (< 37 μm) samples. An enrichment of antimony from 4 to 10 times higher was detected in road dust in Valparaiso, Chile, which correlates with the enrichment reported by our group in 2009 in the blood. On the other hand up to 70% of total antimony extracted from road samples was Sb(III) indicating an anthropogenic origin of this element.
AB - In this study we develop an analytical methods for the determination of total Sb, Sb(V) and Sb(III) in road dust and airborne particulate matter (APM) by HPLC-HG-AFS. For total Sb determination, samples were digested with 6. mL of HNO3 and 2. mL of HBF4 in closed microwave digestion system at 200. °C in 30. min, trueness was determined by using APM certified reference material NIST 1648a. For Sb(V) and Sb(III) determination, oxalic acid 100. mmol. L-1 in 1% w/v ascorbic acid at 70. °C in closed vessel microwave extraction was chosen as extraction procedure. Analytical methods were applied to airborne particulate matter (< 10μm), and road dust (< 37 μm) samples. An enrichment of antimony from 4 to 10 times higher was detected in road dust in Valparaiso, Chile, which correlates with the enrichment reported by our group in 2009 in the blood. On the other hand up to 70% of total antimony extracted from road samples was Sb(III) indicating an anthropogenic origin of this element.
KW - APM
KW - Antimony
KW - HPLC-HG-AFS
KW - Road dust
KW - Speciation
UR - http://www.scopus.com/inward/record.url?scp=84878406421&partnerID=8YFLogxK
U2 - 10.1016/j.microc.2013.04.006
DO - 10.1016/j.microc.2013.04.006
M3 - Article
AN - SCOPUS:84878406421
SN - 0026-265X
VL - 110
SP - 266
EP - 272
JO - Microchemical Journal
JF - Microchemical Journal
ER -