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Published online 2 December 2005
Published in Soil Sci Soc Am J 70:41-47 (2006)
DOI: 10.2136/sssaj2005.0141
© 2005 Soil Science Society of America
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Speciation of Selenium(IV) and Selenium(VI) using Coupled Ion Chromatography—Hydride Generation Atomic Absorption Spectrometry

Sabine Goldberga,*, D. A. Martensb, H. S. Forstera and M. J. Herbelc

a USDA-ARS, George E. Brown Jr., Salinity Lab., 450 W. Big Springs Rd., Riverside, CA 92507
b USDA-ARS Southwest Watershed Research Center, Tucson, AZ 85719
c Dep. of Environmental Sciences, Univ. of California, Riverside, CA 92521



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  		Fig. 1. Schematic of the analytical equipment for the ion chromatography-hydride generation atomic absorption spectrometry method. DQP = Dionex Quick Pump, VGA = Vapor Generation Accessory.

 



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  		Fig. 2. Reproducibility of the IC-HGAAS method for multiple injections of a 20 µg L–1 standard: A) Se(IV); B) Se(VI).

 



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  		Fig. 3. Reproducibility of the IC-HGAAS method for triplicate injections of standards ranging from 5 to 30 µg L–1: (A) Se(IV); (B) Se(VI).

 


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  		Fig. 4. Ability of the IC-HGAAS method to analyze mixed standards in the range of 1 to 30 µg L–1. Parameters are those given in Table 1 except for 1 µg L–1 where attenuation was set at 5 and area reject at 1 000 000.

 


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  		Fig. 5. Ability of the IC-HGAAS method to analyze a natural sample containing both Se redox species.

 




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