A porous carbon derived from amino‐functionalized material of Institut Lavoisier as a solid‐phase microextraction fiber coating for the extraction of phthalate esters from tea

Abstract

In this work, a porous carbon derived from amino-functionalized material of Institut Lavoisier (C-NH2 -MIL-125) was prepared and coated onto a stainless-steel wire through sol-gel technique. The coated fiber was used for the solid-phase microextraction of trace levels of phthalate esters (diallyl phthalate, di-iso-butyl ortho-phthalate, di-n-butyl ortho-phthalate, benzyl-n-butyl ortho-phthalate, and bis(2-ethylhexy) ortho-phthalate) from tea beverage samples before gas chromatography with mass spectrometric analysis. Several experimental parameters that could influence the extraction efficiency such as extraction time, extraction temperature, sample pH, sample salinity, stirring rate, desorption temperature and desorption time, were investigated. Under the optimal conditions, the linearity existed in the range of 0.05-30.00 μg/L for green jasmine tea beverage samples, and 0.10-30.00 μg/L for honey jasmine tea beverage samples, with the correlation coefficients (r) ranging from 0.9939 to 0.9981. The limits of detection of the analytes for the method were 2.0-3.0 ng/L for green jasmine tea beverage sample, and 4.0-5.0 ng/L for honey jasmine tea beverage sample, depending on the compounds. The recoveries of the analytes for the spiked samples were in the range of 82.0-106.0%, and the precision, expressed as the relative standard deviations, was less than 11.1%.

Facile preparation of stainless steel microextraction fiber via in situ growth of metal–organic framework UiO‐66 and its application to sensitive analysis of polycyclic musks

“…But the extracted amounts would decrease with the rising temperature if the temperature exceeds 55°C, due to the decrease of distribution coefficient between the fiber and the headspace [2,11]. SPME is an equilibrium distribution of the analytes between the extraction materials and sample solvent, requiring sufficient extraction time to achieve adsorption equilibrium [8,22]. Before the analytes reached the adsorption equilibrium on the fiber, the amounts of extracted analytes were increased with the extraction time, and the highest response was obtained at 50–60 min (Figure 3B).…”

“…Currently, metal–organic framework (MOF) coated stainless steel (SS) fibers, possessing of the merits including large surface area of MOF [3], low cost, and excellent stability of the SS wire [4,5], have been studied as the most popular SPME materials. Various techniques were applied for bonding MOF on SS wires such as physical adhesion [6,7], sol–gel [8,9], layer‐by‐layer chemical bonding [10], and in situ hydrothermal growth [11–13]. Since the in situ growth strategy effectively integrates the real‐time synthesis and coating of MOF on the fibers, it has been proposed and used intensively for efficient preparation of MOF‐functionalized SPME fibers [11–13].…”

Determination of Phthalate Esters in Water and Coffee by Solid‐Phase Microextraction Using Vinyl Terminated Imidazolium Based Ionic Liquid Grafted on Graphene Oxide Coatings

“…Moreover, the proposed method for the analysis of PAEs was compared with other SPME methods recently reported in literature (Table ). This proposed method with the novel GO‐H 2 NC 3 VIm + Br − home‐made fiber represents shorter extraction time, wider linear range and lower LODs than the reported literature given.…”

Recent Applications and Newly Developed Strategies of Solid-Phase Microextraction in Contaminant Analysis: Through the Environment to Humans

“…Various contaminants were determined by SPME technique in other food commodities (Table 2), such as milk [29,[177][178][179][180][181][182], fish [183][184][185][186][187], honey [188][189][190], tea [191][192][193], coffee [194,195], oil [196,197], butter [198], rice [199], chili [166,200,201], and seaweeds [202]. In particular, in milk SPME has been exploited in different coatings.…”