Simultaneous analysis of betrixaban and hexazinone using liquid chromatography/tandem mass spectrometry in aqueous solutions

Jasemizad, Tahereh; Padhye, Lokesh P.

doi:10.1016/j.mex.2019.07.028

Cited by 12 publications

(9 citation statements)

References 16 publications

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“…The separation was done on a 2.1 × 100 mm, 3.5 μm, Eclipse Plus C18, Agilent column. The details of LC–MS/MS conditions were described previously (Jasemizad and Padhye 2019 ).…”

Section: Methodsmentioning

confidence: 99%

Photodegradation and adsorption of hexazinone in aqueous solutions: removal efficiencies, kinetics, and mechanisms

Jasemizad

Padhye

2022

Environ Sci Pollut Res

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Hexazinone, a globally applied broad-spectrum triazine herbicide, has not been mechanistically investigated previously under advanced oxidation processes (AOPs) and adsorption on activated carbon. In this study, its fate during UV-based oxidation with/without hydrogen peroxide (H2O2) and adsorption on coconut shell–based granular activated carbon (CSGAC) in water matrices was investigated. A comparison between various irradiation sources (visible, UVA, UVB, and UVC) revealed the highest degradation rate under UVC. More than 98% degradation of hexazinone was observed under 3 J cm−2 UVC fluence in the presence of 0.5 mM H2O2 at pH 7. Moreover, the degradation rate enhanced significantly with an increase in the initial dosage of H2O2, UV fluence, and contact time in the UV/H2O2 process. The rate of degradation was lower using secondary effluent than that of Milli-Q water due to the presence of dissolved organics in wastewater. However, the reactions in both matrices obeyed pseudo-first-order kinetics. The effect of different scavengers, including methanol, potassium iodide (KI), and tert-butyl alcohol (TBA), showed that hydroxyl radicals (•OH) played a dominant role in hexazinone degradation in the UV/H2O2 process. Hexazinone was effectively adsorbed by CSGAC through π-π electron donor–acceptor interactions between hexazinone’s triazine ring and CSGAC’s surface functional groups. The isotherm and kinetic studies showed that the adsorption followed the Freundlich model and pseudo-second-order reaction, respectively, suggesting chemisorption. This study provided mechanistic insights on the removal of hexazinone at the tertiary stage of wastewater treatment or the advanced treatment of wastewater reuse.

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“…The separation was done on a 2.1 × 100 mm, 3.5 μm, Eclipse Plus C18, Agilent column. The details of LC–MS/MS conditions were described previously (Jasemizad and Padhye 2019 ).…”

Section: Methodsmentioning

confidence: 99%

Photodegradation and adsorption of hexazinone in aqueous solutions: removal efficiencies, kinetics, and mechanisms

Jasemizad

Padhye

2022

Environ Sci Pollut Res

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“…All the SPE experiments were conducted in duplicates. SPE extraction recoveries were calculated based on the concentration of extracted spiked samples compared with the concentration of standard, as shown in Equation () [32].

\begin{matrix} true \\ left boldExtraction boldRecoveries (() %) \\ left = \frac{boldConcentration boldof boldanalyte boldafter boldSPE}{boldConcentration boldof boldanalyte boldadded boldin boldspiked boldsample} \times 100 % \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

Section: Solid-phase Extraction Proceduresmentioning

confidence: 99%

Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Astuti

Jasemizad

Padhye

2020

J of Separation Science

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A practical and cheap methodology in modifying commercial coconut shell activated carbon for solid‐phase extraction of N‐nitrosodimethylamine in water was developed through an understanding of activated carbon surface chemistry. In comparison with commercial activated carbon, extraction recoveries by activated carbon treated with sulfuric acid decreased by 50%, while those of activated carbon heated at 800°C improved by more than 100%. Acid treatment increased the oxygen content on the carbon's surface. In contrast, heat treatment decreased the surface oxygen content, resulting in a more hydrophobic surface, which favoured adsorption and extraction of N‐nitrosodimethylamine. The influence of different activated carbon sizes, amount of modified activated carbon, and pH on the N‐nitrosodimethylamine recoveries was assessed and compared with the commercial solid‐phase extraction cartridge. The recommended amount of powder activated carbon treated at 800°C was 3 g to yield an optimum recovery of 130%, which was superior to the commercial solid‐phase extraction cartridges. The method validation results confirmed the high accuracy, reproducibility, and precision of the method. The study indicated that chemisorption plays a significant role in the adsorption of N‐nitrosodimethylamine on activated carbon, and the optimization of its surface chemistry can enhance N‐nitrosodimethylamine adsorption/extraction from water.

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“…5,7,8 There were no hazardous, harsh or expensive chemicals used in the proposed method as found in HPLC or LC/MS-MS techniques. [4][5][6] Despite these methods [4][5][6] are more sensitive than the evolved one, but the ecological aspect with integrating green chemistry in the evolved method gave it the preference. Furthermore, the synthesized N,S-CDs probe is characterized by ultra-fast determination unlike the other techniques, which are time consuming and need a long time for conditioning, washing and analysis.…”

Section: Applicationmentioning

confidence: 99%

Microwave assisted synthesis of fluorescent hetero atom doped carbon dots for determination of betrixaban with greenness evaluation

et al. 2023

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Simultaneous analysis of betrixaban and hexazinone using liquid chromatography/tandem mass spectrometry in aqueous solutions

Abstract: Graphical abstract

Cited by 12 publications

References 16 publications

Photodegradation and adsorption of hexazinone in aqueous solutions: removal efficiencies, kinetics, and mechanisms

Photodegradation and adsorption of hexazinone in aqueous solutions: removal efficiencies, kinetics, and mechanisms

Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Microwave assisted synthesis of fluorescent hetero atom doped carbon dots for determination of betrixaban with greenness evaluation

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