Speciative determination of chromium(VI) and chromium(III) using flow-injection on-line preconcentration and flame atomic-absorption spectrometric detection
A rapid, sensitive and selective method for the speciative determination of chromium(VI) and chromium(III) in sea-water samples by flame atomic-absorption spectrometry, using on-line preconcentration on a micro-column packed with C 18 bonded silica gel, has been developed. This is based on the selec...
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Veröffentlicht in: | Analytica chimica acta 1998-08, Vol.369 (1), p.69-77 |
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description | A rapid, sensitive and selective method for the speciative determination of chromium(VI) and chromium(III) in sea-water samples by flame atomic-absorption spectrometry, using on-line preconcentration on a micro-column packed with C
18 bonded silica gel, has been developed. This is based on the selective formation of diethyldithiocarbamate complexes of chromium(VI) in the 1–2 pH range and chromium(III) in the 4–9 pH range in the presence of manganese(II) (which enhances the chromium(III) signal ten-fold). The preconcentrated species desorbed by methanol directly from the column to the nebulizer-burner system using a flow rate of 4.0
ml/min. Five hundred-fold enrichment of Cr(VI) and Cr(III) was observed with a detection limit of 0.02
μg/l for a 5
min preconcentration time. The effect of probable concomitant species in seawater was determined and a satisfactory recovery of 95–105% could be obtained. Linear calibration curves were obtained for both the species, Cr(VI) and Cr(III), in the 0.2–200
μg/l concentration range. Relative standard deviations were 3.5 and 5.1% for Cr(VI) and Cr(III), respectively, in the determination of 50
μg/l of each of these species. The developed procedure was found to be suitable for the determination of Cr(VI) and Cr(III) species (Cr(total)) in various sea-water samples of western and eastern coasts of India. Further, the developed procedure was successfully applied for the determination of Cr(VI) and Cr(III) species in tannery and plating-bath effluents. |
doi_str_mv | 10.1016/S0003-2670(98)00229-3 |
format | Article |
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18 bonded silica gel, has been developed. This is based on the selective formation of diethyldithiocarbamate complexes of chromium(VI) in the 1–2 pH range and chromium(III) in the 4–9 pH range in the presence of manganese(II) (which enhances the chromium(III) signal ten-fold). The preconcentrated species desorbed by methanol directly from the column to the nebulizer-burner system using a flow rate of 4.0
ml/min. Five hundred-fold enrichment of Cr(VI) and Cr(III) was observed with a detection limit of 0.02
μg/l for a 5
min preconcentration time. The effect of probable concomitant species in seawater was determined and a satisfactory recovery of 95–105% could be obtained. Linear calibration curves were obtained for both the species, Cr(VI) and Cr(III), in the 0.2–200
μg/l concentration range. Relative standard deviations were 3.5 and 5.1% for Cr(VI) and Cr(III), respectively, in the determination of 50
μg/l of each of these species. The developed procedure was found to be suitable for the determination of Cr(VI) and Cr(III) species (Cr(total)) in various sea-water samples of western and eastern coasts of India. Further, the developed procedure was successfully applied for the determination of Cr(VI) and Cr(III) species in tannery and plating-bath effluents.</description><identifier>ISSN: 0003-2670</identifier><identifier>EISSN: 1873-4324</identifier><identifier>DOI: 10.1016/S0003-2670(98)00229-3</identifier><identifier>CODEN: ACACAM</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Analytical chemistry ; Applied sciences ; Chemistry ; Chromium ; Effluents ; Exact sciences and technology ; Flow-injection flame AAS ; Natural water pollution ; Pollution ; Seawater ; Seawaters, estuaries ; Speciation ; Spectrometric and optical methods ; Water treatment and pollution</subject><ispartof>Analytica chimica acta, 1998-08, Vol.369 (1), p.69-77</ispartof><rights>1998 Elsevier Science B.V.</rights><rights>1998 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c433t-4708a7c5a3c9130f5acba5197ba292e34548fc8c96957fe0d5ab17ea88bc7a243</citedby><cites>FETCH-LOGICAL-c433t-4708a7c5a3c9130f5acba5197ba292e34548fc8c96957fe0d5ab17ea88bc7a243</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0003267098002293$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2313857$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Prasada Rao, T</creatorcontrib><creatorcontrib>Karthikeyan, S</creatorcontrib><creatorcontrib>Vijayalekshmy, B</creatorcontrib><creatorcontrib>Iyer, C.S.P</creatorcontrib><title>Speciative determination of chromium(VI) and chromium(III) using flow-injection on-line preconcentration and flame atomic-absorption spectrometric detection</title><title>Analytica chimica acta</title><description>A rapid, sensitive and selective method for the speciative determination of chromium(VI) and chromium(III) in sea-water samples by flame atomic-absorption spectrometry, using on-line preconcentration on a micro-column packed with C
18 bonded silica gel, has been developed. This is based on the selective formation of diethyldithiocarbamate complexes of chromium(VI) in the 1–2 pH range and chromium(III) in the 4–9 pH range in the presence of manganese(II) (which enhances the chromium(III) signal ten-fold). The preconcentrated species desorbed by methanol directly from the column to the nebulizer-burner system using a flow rate of 4.0
ml/min. Five hundred-fold enrichment of Cr(VI) and Cr(III) was observed with a detection limit of 0.02
μg/l for a 5
min preconcentration time. The effect of probable concomitant species in seawater was determined and a satisfactory recovery of 95–105% could be obtained. Linear calibration curves were obtained for both the species, Cr(VI) and Cr(III), in the 0.2–200
μg/l concentration range. Relative standard deviations were 3.5 and 5.1% for Cr(VI) and Cr(III), respectively, in the determination of 50
μg/l of each of these species. The developed procedure was found to be suitable for the determination of Cr(VI) and Cr(III) species (Cr(total)) in various sea-water samples of western and eastern coasts of India. Further, the developed procedure was successfully applied for the determination of Cr(VI) and Cr(III) species in tannery and plating-bath effluents.</description><subject>Analytical chemistry</subject><subject>Applied sciences</subject><subject>Chemistry</subject><subject>Chromium</subject><subject>Effluents</subject><subject>Exact sciences and technology</subject><subject>Flow-injection flame AAS</subject><subject>Natural water pollution</subject><subject>Pollution</subject><subject>Seawater</subject><subject>Seawaters, estuaries</subject><subject>Speciation</subject><subject>Spectrometric and optical methods</subject><subject>Water treatment and pollution</subject><issn>0003-2670</issn><issn>1873-4324</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNqFUctu1TAQjRBIXAqfgJQFQu0i4Edy7awQqnhcqRKLAltrMhmDq8QOtm9R_4WPxTepypKVNTPnnBmfU1UvOXvDGd-_vWaMyUbsFTvv9QVjQvSNfFTtuFayaaVoH1e7B8jT6llKN6UUnLW76s_1Quggu1uqR8oUZ-dLFXwdbI0_Y5jdcT7_friowY__GodD6RyT8z9qO4XfjfM3hBvNN5PzVC-RMHgkn-Omd-LbCWaqIRcRbGBIIS7rLJUjcpGmHB2ud6xiz6snFqZEL-7fs-rbxw9fLz83V18-HS7fXzXYSpmbVjENCjuQ2HPJbAc4QMd7NYDoBcm2a7VFjf2-75QlNnYwcEWg9YAKRCvPqteb7hLDryOlbGaXkKYJPIVjMsU3rQQXBdhtQIwhpUjWLNHNEO8MZ-aUhVmzOBGY6bVZszCy8F7dL4CEMNkIHl16IAvJpe5Ugb3bYFQ-e-somoSOiomjK25mMwb3n0V_AYoloYc</recordid><startdate>19980810</startdate><enddate>19980810</enddate><creator>Prasada Rao, T</creator><creator>Karthikeyan, S</creator><creator>Vijayalekshmy, B</creator><creator>Iyer, C.S.P</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>19980810</creationdate><title>Speciative determination of chromium(VI) and chromium(III) using flow-injection on-line preconcentration and flame atomic-absorption spectrometric detection</title><author>Prasada Rao, T ; Karthikeyan, S ; Vijayalekshmy, B ; Iyer, C.S.P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-4708a7c5a3c9130f5acba5197ba292e34548fc8c96957fe0d5ab17ea88bc7a243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Analytical chemistry</topic><topic>Applied sciences</topic><topic>Chemistry</topic><topic>Chromium</topic><topic>Effluents</topic><topic>Exact sciences and technology</topic><topic>Flow-injection flame AAS</topic><topic>Natural water pollution</topic><topic>Pollution</topic><topic>Seawater</topic><topic>Seawaters, estuaries</topic><topic>Speciation</topic><topic>Spectrometric and optical methods</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Prasada Rao, T</creatorcontrib><creatorcontrib>Karthikeyan, S</creatorcontrib><creatorcontrib>Vijayalekshmy, B</creatorcontrib><creatorcontrib>Iyer, C.S.P</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Analytica chimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Prasada Rao, T</au><au>Karthikeyan, S</au><au>Vijayalekshmy, B</au><au>Iyer, C.S.P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Speciative determination of chromium(VI) and chromium(III) using flow-injection on-line preconcentration and flame atomic-absorption spectrometric detection</atitle><jtitle>Analytica chimica acta</jtitle><date>1998-08-10</date><risdate>1998</risdate><volume>369</volume><issue>1</issue><spage>69</spage><epage>77</epage><pages>69-77</pages><issn>0003-2670</issn><eissn>1873-4324</eissn><coden>ACACAM</coden><abstract>A rapid, sensitive and selective method for the speciative determination of chromium(VI) and chromium(III) in sea-water samples by flame atomic-absorption spectrometry, using on-line preconcentration on a micro-column packed with C
18 bonded silica gel, has been developed. This is based on the selective formation of diethyldithiocarbamate complexes of chromium(VI) in the 1–2 pH range and chromium(III) in the 4–9 pH range in the presence of manganese(II) (which enhances the chromium(III) signal ten-fold). The preconcentrated species desorbed by methanol directly from the column to the nebulizer-burner system using a flow rate of 4.0
ml/min. Five hundred-fold enrichment of Cr(VI) and Cr(III) was observed with a detection limit of 0.02
μg/l for a 5
min preconcentration time. The effect of probable concomitant species in seawater was determined and a satisfactory recovery of 95–105% could be obtained. Linear calibration curves were obtained for both the species, Cr(VI) and Cr(III), in the 0.2–200
μg/l concentration range. Relative standard deviations were 3.5 and 5.1% for Cr(VI) and Cr(III), respectively, in the determination of 50
μg/l of each of these species. The developed procedure was found to be suitable for the determination of Cr(VI) and Cr(III) species (Cr(total)) in various sea-water samples of western and eastern coasts of India. Further, the developed procedure was successfully applied for the determination of Cr(VI) and Cr(III) species in tannery and plating-bath effluents.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0003-2670(98)00229-3</doi><tpages>9</tpages></addata></record> |
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subjects | Analytical chemistry Applied sciences Chemistry Chromium Effluents Exact sciences and technology Flow-injection flame AAS Natural water pollution Pollution Seawater Seawaters, estuaries Speciation Spectrometric and optical methods Water treatment and pollution |
title | Speciative determination of chromium(VI) and chromium(III) using flow-injection on-line preconcentration and flame atomic-absorption spectrometric detection |
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