Biodiesel as a green alternative solvent in dispersive liquid-liquid microextraction

Advances in Sample Preparation, Год журнала: 2025, Номер unknown, С. 100163 - 100163

Опубликована: Фев. 1, 2025

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Rapid and Facile Organic Ion-Associate Liquid-Phase Extraction and Spectrophotometric Quantification of Nitrite in Environmental Water Samples

Molecules, Год журнала: 2025, Номер 30(5), С. 1044 - 1044

Опубликована: Фев. 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.

Язык: Английский

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Smartphone Digital Image Colorimetry: An Affordable Easy-To-Use Technique

Analytical Letters, Год журнала: 2025, Номер unknown, С. 1 - 19

Опубликована: Март 5, 2025

Analytical instruments used for scientific research are often expensive. This limitation poses a challenge researchers in low-income laboratories. To address this problem, the improvization of analytical has emerged as viable solution. Herein, we review and discuss, step-by-step, approach using smartphone colorimetric analysis, known digital image colorimetry (SDIC). With its practicality accessibility, SDIC utilizes cameras acquisition free processing programs, Apps, analysis. By leveraging ubiquity affordability technology, offers an accessible cost-effective to resource-constrained settings.

Язык: Английский

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Immobilized sorption microprobes as a tool for small-size colorimetric sensing

Microchemical Journal, Год журнала: 2025, Номер unknown, С. 113577 - 113577

Опубликована: Апрель 1, 2025

Язык: Английский

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