Rapid and Facile Organic Ion-Associate Liquid-Phase Extraction and Spectrophotometric Quantification of Nitrite in Environmental Water Samples DOI Creative Commons
Noriko Hata, Kaoru Minoshima,

Kei Ito

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(5), P. 1044 - 1044

Published: Feb. 25, 2025

Nitrite is a health and environmental hazard pollutes water sources globally, but sensitive, rapid, facile quantification methods are lacking. Herein, we report method for extracting quantifying low-concentration nitrite in surface using minimal sample solvent volumes. The reacted with sulfanilamide N-1-naphthylethylenediammonium dichloride (NED), yielding an azo dye extraction into organic ion-associate liquid phase (IALP) formed situ ethylhexyloxypropylammonium dodecyl sulfate ions. addition of sodium acetate increased the pH, decreasing cation charge from +2 to +1, improving efficiency. Further, adding NaCl doubled IALP volume, reduced required standing time, minimally affected absorbance, concentrated HCl enhanced absorbance intensity via protonation. Crucially, achieved 30-fold concentration factor compared traditional pre-treatment methods, even without centrifugation, as well limit detection 0.09 µg NO2-N/L. Spiked recovery tests river seawater samples (93-103%) matched those established methods. Digital imaging IALP-extracted lake yielded 0.4 efficient approach detection, enabling rapid monitoring spectrophotometry digital imaging.

Language: Английский

DFT investigation on the effect of ZnO microstructure on nitrite catalytic performance and its application in food DOI
Haiyan Song, Haobin Hu, Zhijun Li

et al.

Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 112819 - 112819

Published: Jan. 1, 2025

Language: Английский

Citations

0
Rapid and Facile Organic Ion-Associate Liquid-Phase Extraction and Spectrophotometric Quantification of Nitrite in Environmental Water Samples DOI Creative Commons
Noriko Hata, Kaoru Minoshima,

Kei Ito

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(5), P. 1044 - 1044

Published: Feb. 25, 2025

Nitrite is a health and environmental hazard pollutes water sources globally, but sensitive, rapid, facile quantification methods are lacking. Herein, we report method for extracting quantifying low-concentration nitrite in surface using minimal sample solvent volumes. The reacted with sulfanilamide N-1-naphthylethylenediammonium dichloride (NED), yielding an azo dye extraction into organic ion-associate liquid phase (IALP) formed situ ethylhexyloxypropylammonium dodecyl sulfate ions. addition of sodium acetate increased the pH, decreasing cation charge from +2 to +1, improving efficiency. Further, adding NaCl doubled IALP volume, reduced required standing time, minimally affected absorbance, concentrated HCl enhanced absorbance intensity via protonation. Crucially, achieved 30-fold concentration factor compared traditional pre-treatment methods, even without centrifugation, as well limit detection 0.09 µg NO2-N/L. Spiked recovery tests river seawater samples (93-103%) matched those established methods. Digital imaging IALP-extracted lake yielded 0.4 efficient approach detection, enabling rapid monitoring spectrophotometry digital imaging.

Language: Английский

Citations

0