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An Ionic Liquid-Assisted Mixed Micelle-Mediated Centrifuge-Less Cloud Point Extraction Spectrophotometric Method for the Determination of Molybdenum(VI).

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Titel: An Ionic Liquid-Assisted Mixed Micelle-Mediated Centrifuge-Less Cloud Point Extraction Spectrophotometric Method for the Determination of Molybdenum(VI).
Autoren: Divarova, Vidka, Gajdošová, Andrea, Racheva, Petya, Gavazov, Kiril
Quelle: International Journal of Molecular Sciences; May2025, Vol. 26 Issue 10, p4597, 15p
Schlagwörter: SUSTAINABLE chemistry, NONIONIC surfactants, TERNARY forms, MINERALS in water, MINERAL waters, IONIC surfactants
Abstract: A novel method for the spectrophotometric determination of trace amounts of molybdenum has been developed. This method utilizes a centrifuge-less cloud point extraction (CL-CPE) in a mixed micellar (MM) system containing a nonionic surfactant (Triton X-114) and an ionic liquid (Aliquat® 336, A336). The chromophore chelating reagent employed was 4-nitrocatechol (4NC, H2L). This work marks its first application as a CPE reagent. Under the optimal conditions, Mo(VI) forms a yellow ternary complex with 4NC and A336, which can be represented by the formula (A336+)2[MoO2L2]. The method possesses the following characteristics: limit of detection (LOD) of 3.2 ng mL−1, linear range of 10.8–580 ng/mL, absorption maximum of 435 nm, molar absorptivity coefficient of 3.34 × 105 L mol−1 cm−1, and Sandell's sensitivity of 0.29 ng cm−2. The method has been successfully employed for the determination of molybdenum in reference standard steel samples, bottled mineral water, and a molybdenum-containing dietary supplement. [ABSTRACT FROM AUTHOR]
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Datenbank: Complementary Index
Beschreibung
Abstract:A novel method for the spectrophotometric determination of trace amounts of molybdenum has been developed. This method utilizes a centrifuge-less cloud point extraction (CL-CPE) in a mixed micellar (MM) system containing a nonionic surfactant (Triton X-114) and an ionic liquid (Aliquat<sup>®</sup> 336, A336). The chromophore chelating reagent employed was 4-nitrocatechol (4NC, H<subscript>2</subscript>L). This work marks its first application as a CPE reagent. Under the optimal conditions, Mo(VI) forms a yellow ternary complex with 4NC and A336, which can be represented by the formula (A336<sup>+</sup>)<subscript>2</subscript>[MoO<subscript>2</subscript>L<subscript>2</subscript>]. The method possesses the following characteristics: limit of detection (LOD) of 3.2 ng mL<sup>−1</sup>, linear range of 10.8–580 ng/mL, absorption maximum of 435 nm, molar absorptivity coefficient of 3.34 × 10<sup>5</sup> L mol<sup>−1</sup> cm<sup>−1</sup>, and Sandell's sensitivity of 0.29 ng cm<sup>−2</sup>. The method has been successfully employed for the determination of molybdenum in reference standard steel samples, bottled mineral water, and a molybdenum-containing dietary supplement. [ABSTRACT FROM AUTHOR]
ISSN:16616596
DOI:10.3390/ijms26104597