Dual extraction based on solid phase extraction and solidified floating organic drop microextraction for speciation of arsenic and its distribution in tea leaves and tea infusion by electrothermal vaporization ICP-MS

被引：33
作者：
Chen, Shizhong [1 ]
Li, Jianfen [1 ]
Lu, Dengbo [1 ]
Zhang, Yan [1 ]
机构：
[1] Wuhan Polytech Univ, Coll Food Sci & Engn, 68 Xuefu South Rd Changqing Garden, Wuhan 430023, Peoples R China
来源：
FOOD CHEMISTRY | 2016年 / 211卷
关键词：
Speciation of arsenic and its distribution; Tea leaves and tea infusion; Solid phase extraction; Solidified floating organic drop microextraction; Electrothermal vaporization inductively; coupled plasma mass spectrometry; PLASMA-MASS SPECTROMETRY; CARBON NANOTUBES; WATER; SORBENTS;
D O I：
10.1016/j.foodchem.2016.05.101
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A dual extraction based on solid phase extraction (SPE) and solidified floating organic drop microextraction (SFODME) was developed for As species in tea leaves and tea infusion by electrothermal vaporization inductively coupled plasma mass spectrometry, including total, suspended, soluble, organic and inorganic As as well as As(III) and As(V). In SPE step, titanium dioxide nanotubes were used for preconcentration of analytes and removal of sample matrix. Elution solution from SPE was employed for further preconcentration and separation of analytes with SFODME. Under optimal conditions, detection limits of this method were 0.046 and 0.072 pg mL(-1) with relative standard deviations of 6.3% and 5.8% for As (III) and As(V) (n = 9, c = 1.0 ng mL(-1)), respectively. A preconcentration factor of 500-fold was achieved for As(III) and As(V). This method was successfully applied for analysis of speciation of arsenic and its distribution in tea leaves, tea infusion and certified reference material of tea leaves. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：741 / 747
页数：7
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