Chemical Methodologies

Fe3O4@SiO2@Mel-Rh-Cu: A High-Performance, Green Catalyst for Efficient Xanthene Synthesis and Its Application for Magnetic Solid Phase Extraction of Diazinon Followed by Its Determination through HPLC-UV

Sahar Peiman; Behrooz Maleki; Milad Ghani

Volume 8, Issue 4 , April 2024, , Pages 257-278

https://doi.org/10.48309/chemm.2024.442693.1767

Abstract

A novel, high-performance, recyclable heterogeneous catalyst functionalized with melamine was advantageously prepared and rhodanine on magnetic silica was successfully carried out. ... Read More A novel, high-performance, recyclable heterogeneous catalyst functionalized with melamine was advantageously prepared and rhodanine on magnetic silica was successfully carried out. After that, the Cu ions were coordinated with the existing ligands decorated on the magnetic silica surface. This catalyst was identified by different analyses and acted as a recoverable catalyst for xanthene synthesis. Its advantages include the solvent-free conditions of the reaction, the high efficiency of the products in a short period of time, as well as its simple collection from the reaction environment. Moreover, the prepared sorbent has been developed for the extraction of diazinon from different real samples through magnetic solid phase extraction (MSPE). Under optimal conditions, the linear range for measuring diazinon was 0.5-200 µg L-1. The coefficient of determination (R2) was 0.9985. The limit of detection (LOD) of the method was 0.08 μg L-1. Relative standard deviation values (RSD%) for the concentration of 10.0 μg L-1 and 100 μg L-1 were between 5.3% and 5.9%. Finally, the proposed method was used to determine diazinon in orange and agricultural water. The results showed that the percentage of relative recovery of the selected toxin in the studied real samples was between 92 and 105.Moreover, the prepared sorbent has been developed for the extraction of diazinon from different real samples through magnetic solid phase extraction (MSPE). The parameters affecting the extraction were optimized by response surface methodology (RSM). The optimal extraction conditions were 15 min for contact time, 7 mg for sorbent amount, and 0% (w/v) for NaCl concentration.Moreover, 20 µL of methanol was used to elute the extracted analyte. Under optimal conditions, the linear range for measuring diazinon was 0.5-200 µg L-1. The coefficient of determination (R2) was 0.9985. The limit of detection (LOD) of the method was 0.08 μg L-1. Relative standard deviation values (RSD%) for the concentration of 10.0 μg L-1 and 100 μg L-1 were between 5.3% and 5.9%. Finally, the proposed method was used to determine diazinon in orange and agricultural water. The results showed that the percentage of relative recovery of the selected toxin in the studied real samples was between 92 and 105.

Efficient Catalytic Synthesis of Xanthenes with Copper Immobilized on Amine-Modified NaY

Mohammadreza Azizi Amiri; Hamidreza Younesi; Haniye Kazemi Aqmashhadi; Ghasem Firouzzadeh Pasha; Sakineh Asghari; Mahmood Tajbakhsh

Volume 8, Issue 1 , January 2024, , Pages 1-22

https://doi.org/10.48309/chemm.2024.424058.1737

Abstract

The purpose of this article is to describe the synthesis of copper-amine complexes on nano NaY zeolite (Cu@NNPS-NaY), as a highly efficient, reusable, and environmentally friendly catalyst ... Read More

Articles in Press

Current Issue

Volume 8 (2024)

Volume 7 (2023)

Volume 6 (2022)

Volume 5 (2021)

Volume 4 (2020)

Volume 3 (2019)

Volume 2 (2018)

Volume 1 (2017)

Keywords = Heterogeneous catalyst

Fe3O4@SiO2@Mel-Rh-Cu: A High-Performance, Green Catalyst for Efficient Xanthene Synthesis and Its Application for Magnetic Solid Phase Extraction of Diazinon Followed by Its Determination through HPLC-UV

Abstract

Efficient Catalytic Synthesis of Xanthenes with Copper Immobilized on Amine-Modified NaY

Abstract