Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
Main Article Content
Abstract
reaction of iron (II) with the spectrophotometric reagent Br-PADAP 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol. Arsenic determination with a Sandell’s sensitivity of 3.1 10-4 cm-2, linear range from 0.1 μg ml-1 to 2.0 μg ml-1 (r560 = 0.9995), molar absorptivity of 2.45 105 l mol-1 cm-1 and a concentration
detection limit of 1.4 ng ml-1 (3s) were obtained using a 10 ml sample volume. Selectivity was increased with the use of EDTA as a masking agent. The proposed method was applied for arsenic
determination in the presence of several ions amounts in digested soil samples. The results revealed that antimony (III), mercury (II), germanium (IV), platinum (IV) interferes at all analyzed proportions.
The interferences can be easily removed by the use of EDTA. Precision and accuracy obtained were satisfactory with a R.S.D. < 5 %. Recovery of arsenic in soil samples varied from 95.55 to 102.70 % with a mean of 99.63 %. These results demonstrated that the proposed method is applicable for arsenic analysis in different soil samples.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
The corresponding author transfers the copyright of the submitted manuscript and all its versions to Eclet. Quim., after having the consent of all authors, which ceases if the manuscript is rejected or withdrawn during the review process.
When a published manuscript in EQJ is also published in other journal, it will be immediately withdrawn from EQ and the authors informed of the Editor decision.
Self-archive to institutional, thematic repositories or personal webpage is permitted just after publication. The articles published by Eclet. Quim. are licensed under the Creative Commons Attribution 4.0 International License.
References
J. Bech, C. Poschenrieder, M. Llugany, J. Barceló et al.
Arsenic and heavy metal contamination of soil and vegetation
around a copper mine in Northern Peru. The Science of the
Total Environment 203 (1997) 83-91.
B. J. Alloway Ed. Heavy Metals in Soils, Blackie, Glasgow, (1990) p 83.
D.C. Adriano Trace Elements in the Terrestrial Environment, Springer-Verlag, New York (1986) p 533.
WHO World Health Organization Environmental Health Criteria 224, Arsenic and Arsenic Compounds, 2nd ed., Geneva (2001) p 123.
J.S. Tsuji, M.D.V. Kerkhove, R.S. Kaetzel et al. Evaluation of Exposure to Arsenic in Residential Soil Environmental Health Perspectives 113 (2005) 1735-1740.
H. Narasaki, J.Y. Cao Determination of Arsenic and Selenium by Hydride Generation Atomic Absorption Spectrometry Using a Gas–Liquid Separator and a Dehydration Trap Microchemical Journal 53 (1996) 18-25.
M. Islam, S. Islam, S. Latif Detection of Arsenic in Water, Herbal and Soil Samples by Neutron Activation Analysis Technique Bulletin of Environmental Contamination and Toxicology 79 (2007) 327-330.
A. Väisänen, R. Suontamo, J. Silvonen et al. Ultrasoundassisted extraction in the determination of arsenic, cadmium, copper, lead, and silver in contaminated soil samples by inductively coupled plasma atomic emission spectrometry Analytical and bioanalytical chemistry 373 (2002) 93-97.
M. Bettinelli, U. Baroni, N. Pastorelli Analysis of coal fly
ash and environmental materials by inductively coupled plasma atomic emission spectrometry: comparison of different
decomposition procedures. J Anal Atom Spectrom 2 (1987)
-489.
S. Karthikeyan, T. P. Rao, C. S. P. Iyer Determination of
arsenic in sea water by sorbent extraction with hydride generation atomic absorption spectrometry Talanta 49 (1999) 523-530.
F.B. Martí, F.L. Conde, S.A. Jimeno, J.H. Méndez Quimica Analitica Cualitativa. Madri, Paraninfo (1985) p. 1050.
M.H. Arbab-Zavar, M. Hashemi Evaluation of electrochemical hydride generation for spectrophotometric determination of As (III) by silver diethyldithiocarbamate Talanta 52 (2000) 1007-1014.
American Public Health Association, American Water
Works Association and Water Pollution Control Federation.
Standard Methods for the Examination of Water and
Wastewater. 13th Ed., Washington (2005) p 1368.
R.H. Merry, B.A. Zarcinas Spectrophotometric determination of arsenic and antimony by the silver diethyldithiocarbamate method Analyst 105 (1980) 558-563.
V. Vasak, V. Sedivec Colorimetric determination of
arsenic. Chem.Listy 46 (1952) 341-344.
F. Wei, Q. Song, F. Yin, N. Shen Spectrophotometric
determination of iron in alumi-nium alloys using 2-(5-bromo-
-pyridylazo)-5-diethylaminophenol Mikrochimica Acta 80
(1983) 17-21.
A.C.S. Costa, S.L.C. Ferreira, M.G.M. Andrade, I.P.
Lobo Simultaneous spectrophotometric determination of
nickel and iron in copper-base alloy with bromo-PADAP
Talanta 40 (1993) 1267-1271.
S.L.C. Ferreira, M.L.S. Bandeira, V.A. Lemos, H.C.
Santos, A.C.S. Costa, D.S. Jesus Sensitive spectrophotometric
determination of ascorbic acid in fruit juices and pharmaceutical formulations using 2-(5-bromo-2-pyridylazo)-5-diethylamino-phenol (Br-PADAP) Fresenius J Anal. Chem. 357 (1997) 1174-1178.
J.R. Knechtel, J.L. Fraser Preparation of a stable borohydride solution for use in atomic absorption studies Analyst 103 (1978) 104-105.
A.C.S. Costa, L.S.G. Teixeira, H.V. Jaeger, S.L.C.
Ferreira Spectrophotometric determination of vanadium(IV)
in the presence of vanadium(V) using Br-PADAP. Mikrochim. Acta 130 (1998) 41-45.
B.R. Figueiredo, R.P. Borba, R.S. Angélica Arsenic
occurrence in Brazil and human exposure Environmental
Geochemistry and Health 29 (2007) 109-118.
J.F. Kopp 1-Ephedrine in chloroform as a solvent for silver diethyldithiocarbamate in the deter-mination of arsenic
Anal Chem 45 (1973) 1786-1787.
P.K. Gupta, P.K. Gupta Microdetermination of arsenic in
water, spectrophotometrically, by arsine-silver diethyl-dithiocarbamate-morpholine-chloroform system Mic Journal 33
(1986) 243-251.
A. Afkhami, T. Madrakian, A.A. Assl Kinetic spectrophotometric determination of trace amounts of As(III)
based on its inhibitory effect on the redox reaction between
bromate and hydrochloric acid Talanta 55 (2001) 55-60.
K. Morita, E. Kaneko Spectrophotometric Determination
of Arsenic in Water Samples Based on Micro Particle Formation of Ethyl Violet-Molybdoarsenate Analytical Sciences 22 (2006) 1085-1089
A.M. Kolesnikova, A.I. Lazarev Spectrophotometric
determination of arsenic in copper- and nickel-base alloys by
using iodonitrotetrazolium Zh Anal Khim 46 (1991) 169-174
S. Kundua, S. K. Ghosha, M. Mandala et al.
Spectrophotometric determination of arsenic via arsine generation and in-situ colour bleaching of methylene blue (MB) in micellar medium Talanta 58 (2002) 935-942.