Abstract
Abstract The preparation of magnetic solid adsorbents for solid phase extraction often involved time-consuming stepwise reaction and high-temperature reaction. In this study, the coating of silica and the functionalization of magnetite were performed in a single step at room temperature. The prepared solid adsorbent was phenyl functionalized magnetic adsorbent (Fe3O4@SiO2-Ph). The Fe3O4@SiO2-Ph was used for the determination of phthalates (butyl phthalate, butyl benzyl phthalate, di-ethylhexyl phthalate and di-n-octyl phthalate) in water. Under optimized conditions, this developed magnetic solid phase extraction method achieved the pre-concentration factor of 100, low method detection limit (0.62–1.02 μg/l) and limit of quantitation (1.98–3.25 μg/l), wide linear dynamic range (0.5–100 μg/l) with good coefficient of determination (>0.9980) and good repeatability (relative standard deviation <5%) during the extraction of the selected phthalates. The developed method was also successfully applied to analyze drinking water, mineral water and lake water with good extraction efficiency (70%–102%) and a high degree of precision (≤5%).
Highlights
Phthalate esters (PEs) are synthetic chemicals that have been utilized since the 1930s as plasticizers in polymers and as additives to various products [1, 2]
The current study demonstrated a method that sim- adsorbents were collected in the transmission mode by pressing the plified the preparation of magnetically retrievable adsor- sample with potassium bromide powder to form pellets
The Fourier-transform infrared (FTIR) spectra of the Fe3O4 showed two significant peaks at 670 and 3445 cm−1, which can be attributed to Fe-O and
Summary
Phthalate esters (PEs) are synthetic chemicals that have been utilized since the 1930s as plasticizers in polymers and as additives to various products [1, 2]. These compounds act as the additive to promote the plasticity and flexibility of plastic materials. A recent study showed that one of the PEs, dibutyl phthalate, is toxic to aquatic plants [4]. For these reasons, several developed countries, such as the United States, Japan, China and those in the European Union have restricted the use of PEs in industrial products. Environmental and drinking water quality standards have been developed for environmental and human health protection purposes [9]
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