A hybrid monolithic column based on layered double hydroxide-alginate hydrogel for selective solid phase extraction of lead ions in food and water samples

被引：60

作者：

Wang, Jing ^{[1
]}

Yang, Qingfeng ^{[1
]}

Zhang, Liang ^{[1
]}

Liu, Manshun ^{[1
]}

Hu, Na ^{[2
]}

Zhang, Wentao ^{[1
]}

Zhu, Wenxin ^{[1
]}

Wang, Rong ^{[1
]}

Suo, Yourui ^{[2
]}

Wang, Jianlong ^{[1
]}

机构：

[1] Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Shaanxi, Peoples R China

[2] Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Key Lab Qinghai Tibet Plateau Biol Resour, Xining 810008, Qinghai, Peoples R China

来源：

FOOD CHEMISTRY | 2018年 / 257卷

基金：

中国国家自然科学基金;

关键词：

Layered double hydroxides; Alginate hydrogel; Pb(II); Solid phase extraction; Food; ENVIRONMENTAL-SAMPLES; CARBON NANOTUBES; OXYGEN EVOLUTION; TRACE AMOUNTS; SORBENT; ADSORBENT; NANOSHEETS; REMOVAL; AEROGEL; PB(II);

D O I：

10.1016/j.foodchem.2018.02.143

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In order to develop an accurate and precise determination method based on solid phase extraction of Pb(II) in food and water samples, a hybrid monolithic column based on layered double hydroxides (LDHs) nanosheets-alginate hydrogel has been synthesized. Combining the advantages of porous 3D framework of hydrogel with selective adsorption of LDHs toward Pb(II), the hydrogel-based hybrid monolithic column shows enhanced enrichment selectivity and efficiency for target ions. Effects of hydrogel composition, pH, concentration and type of eluent, sample volume, and interfering ions on the recoveries of the analytes were also investigated. Under the optimal experiment conditions of method, the limit of detection, preconcentration factor and precision as RSD% are found to be 0.39 mu g L-1, 53.7 and 2.65%, respectively. Trace Pb(II) can be quantitatively preconcentrated at pH 6.0 with recoveries >97%. Finally, the method was successfully verified by analyzing spiked Pb2+ in water and drinking samples.

引用

页码：155 / 162

页数：8

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