University of North Florida
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Contact Info

Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Plant -> herb

Citations 2

"Hyphenated Techniques Combined With Atomic Spectrometry For Environmental Studies"
Microchem. J. 1995 Volume 51, Issue 1-2 Pages 88-98
Wang X. O., Zhuang Z. X., Yang P. Y. and Huang B. L.

Abstract: The development and application of hyphenated techniques combined with atomic spectrometries for environmental analysis at Xiamen University, China, are described. The techniques include: flow injection online microcolumns combined with AAS, GFAAS, ICP AFS and ICP-AES for trace and ultratrace analysis of water; flow injection online solvent extraction combined with AAS and ICP-AES; flow injection online hydride generation for the elemental analysis of Chinese herbs and rain by AAS and ICP-AES; flow injection online coprecipitation-dissolution for the determination of trace heavy metals in seawater and rain by GFAAS and ICP-AES; and HPLC combined with ICP-AES for multielement speciation analysis of Chinese tea.
Metals, trace Metals, heavy HPLC Fluorescence Spectrophotometry Spectrophotometry Spectrophotometry Spectrophotometry Spectrophotometry Sample preparation Review Coprecipitation Solvent extraction Volatile generation Speciation Ultratrace Volatile generation

"Arsenic Speciation In Chinese Herb Ligusticum Chuanxiong Hort By Hydride Generation Atomic Fluorescence Spectrometry"
Spectrosc. Lett. 2005 Volume 38, Issue 2 Pages 109-119
Tianlong Deng, Mengxia Liao, Minru Jia

Abstract: Trace arsenic in Ligusticum chuanxiong Hort in the forms arsenite, As(III), arsenate, As(V), and organic arsenic were determined by hydride generation atomic fluorescence spectrometry (HG-AFS). It was observed that As(V) has significant atomic fluorescence that interferes with the signals of As(III) in the 10% HCl matrix. Interferences from heavy metals such as Pb(II) and Cu(II) can cause severe increase of the signals as compared to the insignificant effects caused by Zn(II), Mn(II), Cd(II), and Fe(III). The masking agent 8-hydroxyquinoline was found to be an efficient agent to eliminate interference of transition metals and to remove entirely the atomic fluorescence of As(V) in a mixed As(III)/As(V) solution. A sensitive and interference-free procedure was developed for the arsenic speciation of the Chinese herb samples by use of HG-AFS.
Arsenic, organic Arsenate ion Arsenite Fluorescence Volatile generation Interferences Masking agent