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upconversion nanoparticles capped with molecularly imprinted polymer as fluorescence probe for the determination of ractopamine in water and pork
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نویسنده
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tang yiwei ,li min ,gao ziyuan ,liu xiuying ,gao xue ,ma tao ,lu xiaonan ,li jianrong
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منبع
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food analytical methods - 2017 - دوره : 10 - شماره : 9 - صفحه:2964 -2973
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چکیده
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A novel fluorescence probe was designed and synthesized to quantify ractopamine in foods using molecularly imprinted polymer (mip) as a specific recognition element and yf3:yb3+, er3+ upconversion nanoparticles (ucnps) as a fluorescence signaling component. the developed ucnp@mip probe was characterized using x-ray powder diffraction, scanning electron microscopy, and thermogravimetric analysis. the fluorescence of ucnp@mip probe was quenched specifically by ractopamine, and good linear regression ranging from 1.66 × 10−8 to 3.3 × 10−7 mol/l was obtained with the limit of detection of 8.6 × 10−10 mol/l. this method was further applied to determine ractopamine in water and pork samples. recoveries between 76.61 and 88.97% were obtained with relative standard deviation ranging from 1.15 to 2.67% (n = 3). this ucnp@mip probe combined high selectivity of mip and high sensitivity of upconversion fluorophore and showed potential to determine various food chemical hazards.
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کلیدواژه
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upconversion nanoparticles ,molecularly imprinted polymer ,fluorescent probe ,ractopamine
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آدرس
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bohai university, college of food science & project engineering, china. the university of british columbia, faculty of land and food systems, and health program, canada, bohai university, college of food science & project engineering, china, bohai university, college of food science & project engineering, china, bohai university, college of food science & project engineering, china, bohai university, food safety key lab of liaoning province, china, bohai university, college of food science & project engineering, china, the university of british columbia, faculty of land and food systems, and health program, canada, bohai university, national and local joint engineering research center of storage, china
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Authors
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