Facile synthesis of Fe₃O₄@TMU‐12 (Co‐based magnetic MOF) for extraction of diazinon and chlorpyrifos from the environmental water samples

Abstract

In this study, magnetic metal-organic framework composite (Fe 3 O 4 @ TMU-12) was fabricated and used as an efficient sorbent for magnetic solid-phase extraction of the diazinon and chlorpyrifos from environmental water samples. By simultaneous use of magnetic solid-phase extraction and high-performance liquid chromatography, a simple, quick, exact, and affordable method for the determination of diazinon and chlorpyrifos was achieved. The extraction conditions and efficiency of the magnetic framework composite for diazinon and chlorpyrifos were investigated. Under optimal conditions, the relative recoveries and preconcentration factors of the studied compounds were obtained in the range of 92.0%-99.3% and 201-210, respectively. The calibration curves were obtained in the range of 2-250 μg L À1 and 4-250 μg L À1 for diazinon and chlorpyrifos in water samples, respectively. The LODs were 0.5 and 0.8 μg L À1 for diazinon and chlorpyrifos, respectively (based on S/N = 3). The precision evaluated in terms of the relative standard deviations of intra-and inter-day tests ranged from 3.4% to 3.8% and from 3.9% to 4.1%, respectively. The results show that the Fe 3 O 4 @TMU-12 combine advantages of magnetic nanoparticles and metal-organic frameworks, and are the promising sorbents in the magnetic solid-phase extraction of diazinon and chlorpyrifos from environmental water samples.

Simple and rapid determination of tartrazine in fake saffron using the metal organic framework (Fe SA MOF@CNF) by HPLC/PDA

“…Based on previous literature, MOFs are widely applied in numerous applications, comprising gas absorption and storage, drug delivery, catalytic activity, sensing, food packaging, microbiology, and adsorption environmental and food pollutants 16 – 19 . In recent years, the use of MOFs as new adsorbents due to their unique characteristics, including high specific surface area, high adsorption capacity, high pore volume and porosity, and large accessible cavities, has been superior to conventional adsorbents such as silica, zeolites, and activated carbon 20 , 21 . In order to enhance the adsorption efficiency of MOFs, these three-dimensional structures can be combined with other nanostructures like carbon fibers.…”

Application of a magnetically separable Zr-MOF for fast extraction of palladium before its spectrophotometric detection

“…After being synthesized, a variety of functional groups may be added to the lattice to modify the physicochemical properties of MOFs. MOFs have found a wide range of applications in chemical analysis [ 16 ] to extract and preconcentrate various analytes such as dyes [ 17 – 19 ], pesticides [ 20 ], organic pollutants [ 21 ], and so on. One of the most popular kinds of MOF materials are zirconium MOFs owing to their superior chemical, thermal, and mechanical stability and minimal toxicity [ 22 ].…”

One‐pot fabrication of magnetic adsorbent based on polymeric ionic liquid/aminated carbon nanotubes composite for efficient capture of synthetic auxins in complex samples prior to chromatographic analysis

“…As with other adsorption formats [14][15][16][17], FMNPs are the kernel of MSPE because they can affect the extraction performance of analytes significantly. So far, all kinds of materials such as carbon-based materials [18,19], molecularly imprinted polymers [20], metal-organic frameworks [21,22], and covalent organic frameworks [23] have been introduced to modify magnetic cores (typically, Fe 3 O 4 ).…”