Zobrazeno 1 - 10 of 14 pro vyhledávání: '"Shelja Tiwari"'
5
Rapid on-line solid phase enrichment using polytetrafluoroethylene beads for chromium speciation in contaminated real water samples
Autor: Niharika Sharma, Reena Saxena, Shelja Tiwari
Publikováno v: International Journal of Environmental Science and Technology. 16:383-390
Due to unchecked disposal of industrial wastes into surrounding areas, the pollution of water bodies with heavy metal toxicants has become an environmental menace. The toxicity of chromium species depends on its oxidation states, and thus regular mon
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::57c8a8759d8569dd8139364c695a42bf
https://doi.org/10.1007/s13762-017-1615-5
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6
Modified carbon nanotubes in online speciation of chromium in real water samples using hyphenated FI-FAAS
Autor: Niharika Sharma, Reena Saxena, Shelja Tiwari
Publikováno v: New Journal of Chemistry. 41:5034-5039
The aim of this study is to chemically modify multi-walled carbon nanotubes (MWCNTs) with L-arginine and then use them for speciation and preconcentration of chromium species. A flow injection (FI) system hyphenated to flame atomic absorption spectro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f11c4fb9e71ecfc7542b2d4b20c646e8
https://doi.org/10.1039/c7nj01253e
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7
Determination of Metal Contaminants in Beverages Using Solid Phase Extraction-Based Preconcentration and Subsequent Determination Using Spectro-Analytical Techniques
Autor: Shelja Tiwari, Niharika Sharma, Reena Saxena
Beverages are an indispensable aspect of nutrition and refreshment, so much so that today they are available in numerous varieties which cater to different requirements of humans. However, with the boom in the beverage industries providing inexhausti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::411ae84c347db8eb73ba604a9264de5e
https://doi.org/10.1016/b978-0-12-816681-9.00004-7
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9
Efficient lead preconcentration using two chemically functionalized carbon nanotubes in hyphenated flow injection-flame atomic absorption spectrometry system
Autor: Vanshika Jain, Niharika Sharma, Reena Saxena, Shelja Tiwari, Sonam Bajaj
Publikováno v: Journal of Chromatography A. 1638:461888
Lead contamination in drinking and natural water has reached alarming concentrations, thus necessitating the development of accurate and rapid determination systems for Pb(II) in aqueous systems. Two hyphenated flow injection-solid phase extraction-
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bd0e22f5a54b99f251c61c789e8b4c9
https://doi.org/10.1016/j.chroma.2021.461888
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10
On-line speciation of chromium using a modified chelating resin and determination in industrial water samples by flame atomic absorption spectrometry
Autor: Niharika Sharma, Reena Saxena, Shelja Tiwari
Publikováno v: New Journal of Chemistry. 40:1412-1419
A flow injection-flame atomic absorption spectrometry (FI-FAAS) system for the speciation of Cr(III)/Cr(VI) based on solid phase extraction (SPE) has been proposed. A newly synthesized resin, Amberlite XAD-16 modified with α-benzoin oxime was used a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::861c63b3addb30bfda35e6a5f1e64fb2
https://doi.org/10.1039/c5nj02283e
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