Biomass reinforced graphene oxide solid/liquid phase membrane extraction for the measurement of Pb(II) in food samples

Jing Wang; Manshun Liu; Liang Zhang; Tianshu Zhang; Tianli Yue; Zhonghong Li; Na Hu; Yourui Suo; Jianlong Wang

doi:10.1016/j.foodchem.2018.06.137

Biomass reinforced graphene oxide solid/liquid phase membrane extraction for the measurement of Pb(II) in food samples

Food Chem. 2018 Dec 15:269:9-15. doi: 10.1016/j.foodchem.2018.06.137. Epub 2018 Jun 28.

Authors

Jing Wang¹, Manshun Liu¹, Liang Zhang¹, Tianshu Zhang¹, Tianli Yue¹, Zhonghong Li¹, Na Hu², Yourui Suo², Jianlong Wang³

Affiliations

¹ College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China.
² Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, The Chinese Academy of Sciences, Xining 810008, Qinghai, China.
³ College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, The Chinese Academy of Sciences, Xining 810008, Qinghai, China. Electronic address: wanglong79@nwsuaf.edu.cn.

PMID: 30100489
DOI: 10.1016/j.foodchem.2018.06.137

Abstract

Here, a solid/liquid phase extraction mode was used for the preconcentration of Pb(II) in water and food samples through a biomass reinforced graphene oxide (BGO) membrane. Taking advantage of the two modes, the synergistic effect of BGO membrane (solid extraction) and organic solvent (liquid extraction) enhances the extraction efficiency toward target ion. In detail, the effect of composition parameters in BGO membrane and experiment conditions such as pH, eluent types, elution time and sample volume were optimized, as well as shows no obvious interference toward different competing ions. Under the optimal experiment conditions, the limit of detection, precision as RSD% of this method were found to be 0.84 μg L^-1 and 4.65%, respectively. Moreover, the large enrichment factor of BGO membrane demonstrates the applicability of the use of large sample volumes. Furthermore, the method was successfully verified by analyzing spiked Pb(II) in water and food samples.

Keywords: Biomass; Food sample; Graphene oxide membrane; Pb(II); Solid/liquid phase extraction.

MeSH terms

Biomass
Food Analysis / methods*
Food Contamination / analysis*
Graphite / chemistry*
Lead / analysis*
Limit of Detection
Oxides
Solid Phase Extraction / methods*

Substances

Oxides
Lead
Graphite