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Moghimi, A. (2012). Extraction of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid. Journal of Chemical Health Risks, 2(1), -. doi: 10.22034/jchr.2012.543985
A. Moghimi. "Extraction of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid". Journal of Chemical Health Risks, 2, 1, 2012, -. doi: 10.22034/jchr.2012.543985
Moghimi, A. (2012). 'Extraction of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid', Journal of Chemical Health Risks, 2(1), pp. -. doi: 10.22034/jchr.2012.543985
Moghimi, A. Extraction of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid. Journal of Chemical Health Risks, 2012; 2(1): -. doi: 10.22034/jchr.2012.543985

Extraction of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid

Article 5, Volume 2, Issue 1, Winter 2012  XML PDF (292.24 K)
DOI: 10.22034/jchr.2012.543985
Author
A. Moghimi
Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, Varamin, Iran
Receive Date: 10 March 2012,  Revise Date: 24 April 2019,  Accept Date: 29 October 2018 
Abstract
A new approach for a cloud point extraction-electrothermal atomic absorption spectrometric method was used for determining bismuth. The aqueous analyte was acidified with sulfuric acid (pH 3.0–3.5). Triton X-114 was added as a surfactant and 2-amino-cyclopentene-1-dithiocarboxylic acid was used as a complexing agent. After phase separation at 50 ◦C based on the cloud point separation of the mixture, the surfactant-rich phasen was diluted using tetrahydrofuran (THF). Twenty microliters (20 μL) of the enriched solution and 10 µl of 0.1% (w/v) Pd (NO3)2 as chemical modifier were dispersed into the graphite tube and the analyte was determined by electrothermal atomic absorption spectrometry. After optimizing extraction conditions and instrumental parameters, a preconcentration factor of 195 was obtained for a sample of only 10 mL. The detection limit was 0.04 ng ml−1 and the analytical curve was linear for the concentration range of 0.04–0.70 ng mL−1. Relative standard deviations were <5%. The method was successfully applied for the extraction and determination of bismuth in water samples. 
Keywords
Cloud point extraction; Bismuth; Electrothermal atomic absorption spectrometry; 2-aminocyclopentene- 1-dithiocarboxylic acid; Tap water
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