Assessment of Homogeneity and Minimum Sample Mass for Cadmium Analysis in Powdered Certified Reference Materials and Real Rice Samples by Solid Sampling Electrothermal Vaporization Atomic Fluorescence Spectrometry

2013 ◽  
Vol 61 (4) ◽  
pp. 848-853 ◽  
Author(s):  
Xuefei Mao ◽  
Jixin Liu ◽  
Yatao Huang ◽  
Li Feng ◽  
Lihua Zhang ◽  
...  
Keyword(s):  
Reference Materials ◽  
Certified Reference Materials ◽  
Fluorescence Spectrometry ◽  
Atomic Fluorescence Spectrometry ◽  
Solid Sampling ◽  
Electrothermal Vaporization ◽  
Sample Mass ◽  
Atomic Fluorescence ◽  
Rice Samples ◽  
Minimum Sample

An integrated quartz tube atom trap coupled with solid sampling electrothermal vapourization and its application to detect trace lead in food samples by atomic fluorescence spectrometry

2016 ◽  
Vol 31 (11) ◽  
pp. 2253-2260 ◽  
Author(s):  
Li Feng ◽  
Jixin Liu ◽  
Xuefei Mao ◽  
Dong Lu ◽  
Xiaofang Zhu ◽  
...  
Keyword(s):  
Food Samples ◽  
Electrical Heating ◽  
Fluorescence Spectrometry ◽  
Quartz Tube ◽  
Atomic Fluorescence Spectrometry ◽  
Solid Sampling ◽  
Two Stage ◽  
Atomic Fluorescence ◽  
Atom Trap ◽  
Heating Coils

A two-stage diameter-varied quartz tube (QT) consisting of a QT electrothermal vapourizer, a quartz tube atom trap (QTAT) and two separate Ni–Cr electrical heating coils was interfaced with atomic fluorescence spectrometry (AFS).

scholarly journals Simultaneous Determination of Methylmercury and Ethylmercury in Rice by Capillary Gas Chromatography Coupled On-line with Atomic Fluorescence Spectrometry

2005 ◽  
Vol 88 (2) ◽  
pp. 665-669 ◽  
Author(s):  
Jian-Bo Shi ◽  
Li-Na Liang ◽  
Gui-Bin Jiang
Keyword(s):  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Capillary Gas Chromatography ◽  
Total Mercury ◽  
Fluorescence Spectrometry ◽  
Atomic Fluorescence Spectrometry ◽  
Atomic Fluorescence ◽  
On Line ◽  
Rice Samples

Abstract A comprehensive method for simultaneous determination of methylmercury (MeHg) and ethylmercury (EtHg) in rice by capillary gas chromatography (GC) coupled on-line with atomic fluorescence spectrometry was developed. The experimental conditions, including the pyrolyzer temperature and flow rates of the make-up gas and sheath gas, were optimized in detail. The absolute detection limits (3σ) were 0.005 ng as Hg for both MeHg and EtHg. The relative standard deviation values (n = 5) for 10 ng Hg/mL of MeHg and EtHg were 2.5 and 1.3%, respectively. The method was evaluated by analyzing 2 certified reference materials (DORM-2 and GBW08508), and the determined values of MeHg and total mercury concentrations were in good agreement with the certified values. In addition, the recoveries of MeHg and EtHg spiked into a rice sample collected from Jiangsu province in China were 86 and 77%, respectively. The proposed method was applied to analysis of MeHg and EtHg in 25 rice samples cultivated in 15 provinces of China. In all samples, MeHg was detectable and no EtHg was found. The MeHg contents in rice samples ranged from 1.9 to 10.5 ng/g, accounting for 7–44% of the total mercury measured.

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