Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry
A simple and robust on-line sequential injection system based on solid phase extraction (SPE) coupled to a flow injection hydride generation atomic absorption spectrometer (FI-HGAAS) with a heated quartz tube atomizer (QTA) was developed and optimized for the determination of As(III) in groundwater...
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todo:paper_03043894_v188_n1-3_p311_Sigrist2023-10-03T15:20:13Z Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry Sigrist, M. Albertengo, A. Beldoménico, H. Tudino, M. AAS Arsenic speciation Flow injection Hydride generation On-line separation AAS Arsenic speciation Flow injection Hydride generation On-line separation Absorption spectroscopy Arsenic Atomic absorption spectrometry Chlorine compounds Effluent treatment Groundwater Hydrochloric acid Inductively coupled plasma mass spectrometry Mass spectrometers Negative ions Optimization Oxygen Potassium iodide Projectiles Quartz Water absorption Water injection Water pollution Water quality Extraction arsenic bicarbonate chloride ground water hydrochloric acid nitrate oxygen sodium borohydride sodium hydroxide sulfate arsenic bicarbonate chloride extraction method groundwater resource hydrochloric acid inorganic compound ion exchange nitrate speciation (chemistry) spectrometry sulfate water quality acidification anion exchange article atomic absorption spectrometry flow injection analysis high performance liquid chromatography mass spectrometry pH solid phase extraction water analysis water pollutant water quality Arsenic Arsenicals Equipment Design Limit of Detection Solid Phase Extraction Spectrophotometry, Atomic Water Water Supply A simple and robust on-line sequential injection system based on solid phase extraction (SPE) coupled to a flow injection hydride generation atomic absorption spectrometer (FI-HGAAS) with a heated quartz tube atomizer (QTA) was developed and optimized for the determination of As(III) in groundwater without any kind of sample pretreatment. The method was based on the selective retention of inorganic As(V) that was carried out by passing the filtered original sample through a cartridge containing a chloride-form strong anion exchanger. Thus the most toxic form, inorganic As(III), was determined fast and directly by AsH3 generation using 3.5molL-1 HCl as carrier solution and 0.35% (m/v) NaBH4 in 0.025% NaOH as the reductant. Since the uptake of As(V) should be interfered by several anions of natural occurrence in waters, the effect of Cl-, SO4 2-, NO3 -, HPO4 2-, HCO3 - on retention was evaluated and discussed. The total soluble inorganic arsenic concentration was determined on aliquots of filtered samples acidified with concentrated HCl and pre-reduced with 5% KI-5% C6H8O6 solution. The concentration of As(V) was calculated by difference between the total soluble inorganic arsenic and As(III) concentrations. Detection limits (LODs) of 0.5μgL-1 and 0.6μgL-1 for As(III) and inorganic total As, respectively, were obtained for a 500μL sample volume. The obtained limits of detection allowed testing the water quality according to the national and international regulations. The analytical recovery for water samples spiked with As(III) ranged between 98% and 106%. The sampling throughput for As(III) determination was 60samplesh-1. The device for groundwater sampling was especially designed for the authors. Metallic components were avoided and the contact between the sample and the atmospheric oxygen was carried to a minimum. On-field arsenic species separation was performed through the employ of a serial connection of membrane filters and anion-exchange cartridges. Advantages derived from this approach were evaluated. HPLC-ICPMS was employed to study the consistency of the analytical results. © 2011 Elsevier B.V. Fil:Sigrist, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tudino, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03043894_v188_n1-3_p311_Sigrist |
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Universidad de Buenos Aires |
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I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
AAS Arsenic speciation Flow injection Hydride generation On-line separation AAS Arsenic speciation Flow injection Hydride generation On-line separation Absorption spectroscopy Arsenic Atomic absorption spectrometry Chlorine compounds Effluent treatment Groundwater Hydrochloric acid Inductively coupled plasma mass spectrometry Mass spectrometers Negative ions Optimization Oxygen Potassium iodide Projectiles Quartz Water absorption Water injection Water pollution Water quality Extraction arsenic bicarbonate chloride ground water hydrochloric acid nitrate oxygen sodium borohydride sodium hydroxide sulfate arsenic bicarbonate chloride extraction method groundwater resource hydrochloric acid inorganic compound ion exchange nitrate speciation (chemistry) spectrometry sulfate water quality acidification anion exchange article atomic absorption spectrometry flow injection analysis high performance liquid chromatography mass spectrometry pH solid phase extraction water analysis water pollutant water quality Arsenic Arsenicals Equipment Design Limit of Detection Solid Phase Extraction Spectrophotometry, Atomic Water Water Supply |
| spellingShingle |
AAS Arsenic speciation Flow injection Hydride generation On-line separation AAS Arsenic speciation Flow injection Hydride generation On-line separation Absorption spectroscopy Arsenic Atomic absorption spectrometry Chlorine compounds Effluent treatment Groundwater Hydrochloric acid Inductively coupled plasma mass spectrometry Mass spectrometers Negative ions Optimization Oxygen Potassium iodide Projectiles Quartz Water absorption Water injection Water pollution Water quality Extraction arsenic bicarbonate chloride ground water hydrochloric acid nitrate oxygen sodium borohydride sodium hydroxide sulfate arsenic bicarbonate chloride extraction method groundwater resource hydrochloric acid inorganic compound ion exchange nitrate speciation (chemistry) spectrometry sulfate water quality acidification anion exchange article atomic absorption spectrometry flow injection analysis high performance liquid chromatography mass spectrometry pH solid phase extraction water analysis water pollutant water quality Arsenic Arsenicals Equipment Design Limit of Detection Solid Phase Extraction Spectrophotometry, Atomic Water Water Supply Sigrist, M. Albertengo, A. Beldoménico, H. Tudino, M. Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| topic_facet |
AAS Arsenic speciation Flow injection Hydride generation On-line separation AAS Arsenic speciation Flow injection Hydride generation On-line separation Absorption spectroscopy Arsenic Atomic absorption spectrometry Chlorine compounds Effluent treatment Groundwater Hydrochloric acid Inductively coupled plasma mass spectrometry Mass spectrometers Negative ions Optimization Oxygen Potassium iodide Projectiles Quartz Water absorption Water injection Water pollution Water quality Extraction arsenic bicarbonate chloride ground water hydrochloric acid nitrate oxygen sodium borohydride sodium hydroxide sulfate arsenic bicarbonate chloride extraction method groundwater resource hydrochloric acid inorganic compound ion exchange nitrate speciation (chemistry) spectrometry sulfate water quality acidification anion exchange article atomic absorption spectrometry flow injection analysis high performance liquid chromatography mass spectrometry pH solid phase extraction water analysis water pollutant water quality Arsenic Arsenicals Equipment Design Limit of Detection Solid Phase Extraction Spectrophotometry, Atomic Water Water Supply |
| description |
A simple and robust on-line sequential injection system based on solid phase extraction (SPE) coupled to a flow injection hydride generation atomic absorption spectrometer (FI-HGAAS) with a heated quartz tube atomizer (QTA) was developed and optimized for the determination of As(III) in groundwater without any kind of sample pretreatment. The method was based on the selective retention of inorganic As(V) that was carried out by passing the filtered original sample through a cartridge containing a chloride-form strong anion exchanger. Thus the most toxic form, inorganic As(III), was determined fast and directly by AsH3 generation using 3.5molL-1 HCl as carrier solution and 0.35% (m/v) NaBH4 in 0.025% NaOH as the reductant. Since the uptake of As(V) should be interfered by several anions of natural occurrence in waters, the effect of Cl-, SO4 2-, NO3 -, HPO4 2-, HCO3 - on retention was evaluated and discussed. The total soluble inorganic arsenic concentration was determined on aliquots of filtered samples acidified with concentrated HCl and pre-reduced with 5% KI-5% C6H8O6 solution. The concentration of As(V) was calculated by difference between the total soluble inorganic arsenic and As(III) concentrations. Detection limits (LODs) of 0.5μgL-1 and 0.6μgL-1 for As(III) and inorganic total As, respectively, were obtained for a 500μL sample volume. The obtained limits of detection allowed testing the water quality according to the national and international regulations. The analytical recovery for water samples spiked with As(III) ranged between 98% and 106%. The sampling throughput for As(III) determination was 60samplesh-1. The device for groundwater sampling was especially designed for the authors. Metallic components were avoided and the contact between the sample and the atmospheric oxygen was carried to a minimum. On-field arsenic species separation was performed through the employ of a serial connection of membrane filters and anion-exchange cartridges. Advantages derived from this approach were evaluated. HPLC-ICPMS was employed to study the consistency of the analytical results. © 2011 Elsevier B.V. |
| format |
JOUR |
| author |
Sigrist, M. Albertengo, A. Beldoménico, H. Tudino, M. |
| author_facet |
Sigrist, M. Albertengo, A. Beldoménico, H. Tudino, M. |
| author_sort |
Sigrist, M. |
| title |
Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| title_short |
Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| title_full |
Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| title_fullStr |
Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| title_full_unstemmed |
Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| title_sort |
determination of as(iii) and total inorganic as in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry |
| url |
http://hdl.handle.net/20.500.12110/paper_03043894_v188_n1-3_p311_Sigrist |
| work_keys_str_mv |
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1782023830187802624 |