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Extraction and cleanup of soil arsenical residues for analysis by high pressure liquid chromatographic-graphite furnace atomic absorption
Year:
1980
Authors :
Aharonson, Nadav
;
.
Volume :
63
Co-Authors:
Iadevaia, R., US Dept. Agric. Pesticide Degradat. Lab., Agric. Environm. Quality Inst., Beltsville, Md. 20705, United States
Aharonson, N., US Dept. Agric. Pesticide Degradat. Lab., Agric. Environm. Quality Inst., Beltsville, Md. 20705, United States
Wollson, E.A., US Dept. Agric. Pesticide Degradat. Lab., Agric. Environm. Quality Inst., Beltsville, Md. 20705, United States
Facilitators :
From page:
742
To page:
746
(
Total pages:
5
)
Abstract:
An analytical procedure for the extraction and cleanup of arsenical residues from soil was developed to meet the specific requirements for separation by high pressure liquid chromatography (HPLC) and on-line analysis by a graphite furnace atomic absorption spectrophotometer (GFAA). Soil samples were extracted with 2M aqueous NH 1OH, cleaned on a carbon-Celite chromatographic column, concentrated to 1 g soil extract equivalent per mL, and determined by HPLC-GFAA. Recovery values were as follows: dimethylarsinic acid (cacodylic acid, CA) 90%; methanearsonic acid (MAA) 8.3%; arsenate 56%; and arsenite 64%. The limit of detection was 0.5 ppm in soil. Additional cleanup on cellulose thin layer chromatographic (TLC) plates improved sensitivity to less than 0.1 ppm and also served for confirmation of identity. The soil extract matrix did not appear to affect GFAA signal response. High salt content in concentrated soil samples altered the dimethylarsinic acid HPLC retention volume. By the time of analysis, arsenite was completely oxidized to arsenate in soil extractant.
Note:
Related Files :
Arsenic
methodology
soil
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DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Language:
English
Editors' remarks:
ID:
32434
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:09
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Scientific Publication
Extraction and cleanup of soil arsenical residues for analysis by high pressure liquid chromatographic-graphite furnace atomic absorption
63
Iadevaia, R., US Dept. Agric. Pesticide Degradat. Lab., Agric. Environm. Quality Inst., Beltsville, Md. 20705, United States
Aharonson, N., US Dept. Agric. Pesticide Degradat. Lab., Agric. Environm. Quality Inst., Beltsville, Md. 20705, United States
Wollson, E.A., US Dept. Agric. Pesticide Degradat. Lab., Agric. Environm. Quality Inst., Beltsville, Md. 20705, United States
Extraction and cleanup of soil arsenical residues for analysis by high pressure liquid chromatographic-graphite furnace atomic absorption
An analytical procedure for the extraction and cleanup of arsenical residues from soil was developed to meet the specific requirements for separation by high pressure liquid chromatography (HPLC) and on-line analysis by a graphite furnace atomic absorption spectrophotometer (GFAA). Soil samples were extracted with 2M aqueous NH 1OH, cleaned on a carbon-Celite chromatographic column, concentrated to 1 g soil extract equivalent per mL, and determined by HPLC-GFAA. Recovery values were as follows: dimethylarsinic acid (cacodylic acid, CA) 90%; methanearsonic acid (MAA) 8.3%; arsenate 56%; and arsenite 64%. The limit of detection was 0.5 ppm in soil. Additional cleanup on cellulose thin layer chromatographic (TLC) plates improved sensitivity to less than 0.1 ppm and also served for confirmation of identity. The soil extract matrix did not appear to affect GFAA signal response. High salt content in concentrated soil samples altered the dimethylarsinic acid HPLC retention volume. By the time of analysis, arsenite was completely oxidized to arsenate in soil extractant.
Scientific Publication
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