Graphene oxide cross-linked with phytic acid: an efficient adsorbent for the extraction of carbamates

被引:19
|
作者
Wu, Juanjuan [1 ]
Liang, Xinyu [1 ]
Hao, Lin [1 ]
Wang, Chun [1 ]
Wu, Qiuhua [1 ]
Wang, Zhi [1 ]
机构
[1] Heibei Agr Univ, Dept Chem, Coll Sci, Baoding 071001, Hebei, Peoples R China
基金
中国国家自然科学基金;
关键词
Nanocomposite; Amphiphilicity; Apple analysis; Juice analysis; Solid phase extraction; High performance liquid chromatography; SOLID-PHASE EXTRACTION; PERFORMANCE LIQUID-CHROMATOGRAPHY; CHEMICAL-REDUCTION; FRUIT SAMPLES; PESTICIDES; MICROEXTRACTION; CARBON; WATER;
D O I
10.1007/s00604-017-2413-y
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A nanocomposite (designated as PAG) possessing amphiphilic properties was prepared by a single-step method from graphene oxide and phytic acid, in which phytic acid acts as both an inducer and cross-linking agent. The morphology and microstructure of PAG were characterized by nitrogen adsorption, scanning electron microscopy and transmission electron microscopy. The PAG possess a 3 dimensional network structure with interpenetrated nano-and micropores and represent a viable adsorbent for solid-phase extraction of carbamate pesticides prior to their quantitation by high performance liquid chromatography. Under optimum conditions, the calibration plot is linear in the 0.5 to 80 ng g(-1) concentration range in case of apple samples, and in the 1.0 to 80 ng mL-1 range for juice samples. The respective limits of detection (for S/N = 3) are between 0.05 and 0.1 ng g(-1), and between 0.2 and 0.3 ng mL(-1). The PAG has a high adsorption capability, and in our preception it may become a useful adsorbent for the preconcentration of other organic pollutants.
引用
收藏
页码:3773 / 3779
页数:7
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