Speciation selenium

Camara C, Cobo MA, Palacios R, Munoz R, and Donard OFX (1995) Selenium speciation analyses in water and sediment matrices. In Quevauviller Ph, Maier EA and Griepink B, eds. Quality assurance for environmental analysis, pp 237-262. Elsevier, Amsterdam. 

Kolasa et al. [562] have reported changes in the degree of oxidation of chromium (from Cr6+ to Cr3+) in the course of probe mineralisation of PE for AAS analysis. HPLC-ICP-MS has been used as a selenium-specific detector [563]. Other selenium speciation work by ICP-MS has been reported [564]. Numerous other examples of speciation analysis have been described for the most appropriate techniques (Chapter 7). 

Templeton AS, Trainor TP, Spormann AM, Brown GE Jr (2003b) Selenium speciation and partitioning within Burkholderia cepacia biofilms formed on a-Al203 surfaces. Geochim Cosmochim Acta 67 3547-3557 Templeton AS, Trainor TP, Traina SJ, Spormann AM, Brown GE Jr (2001) Pb(II) distributions at bio film-metal oxide interfaces. Proc Natl Acad Sci USA 98 11897-11902... 

On-line anion exchange LC/ICP-MS methods for selenium and chromium speciation have been published [30], In studies of selenium speciation in environmental samples LC/ICP-MS and LC/ ESI-MS methods have been used for the determination of both inorganic and organic selenium species [43]. For the determination of methyl selenide, strong anion exchange and RP chromatography have been employed [43], while for the determination of seleno-aminoacids, IP RP chromatography with on-line detection based on ICP-MS has been successfully employed [44],... 

By combining denaturing gel electrophoresis (SDS-PAGE) and LA-ICP-MS an analytical technique was developed for the speciation of selenoproteins in Se contaminated wildlife (waterfowl embryo and fish ovary collected from Se contaminated sites in Wyoming and the San Joaquin Valleys, CA, respectively).72 Polatajko et al. reported on the state of the art of selenium speciation in biological samples.73... 

Gallus, S.M. and Heumann, K.G. (1996) Development of gas-chromatography inductively-coupled plasma isotope-dilution mass-spectrometry system for accurate determination of volatile element species. 1. Selenium speciation./. Anal. At. Spectrom., 11, 887-892. 

Michalke, B. and Schramel, R (1998) Selenium speciation by interfacing capillary electrophoresis with inductively coupled plasma mass spectrometry. Electrophoresis, 19,270-275. 

Calle, M.B. de la, Scerbo, R., Chiavarini, S., Quevauviller, Ph. and Morabito, R. (1997) Comparison of derivatization methods for the determination of butyl- and phenyl-tin compounds in mussels by gas chromatography. Appl. Organometal. Chem., 11, 693. Cimara, C., Cobo, M.G., Palacios, M.A., Munoz, R. and Donard, O.FX. (1996) Selenium speciation analyses in water and sediment matrices. In Quality Assurance for Environmental Analysis (eds Quevauviller, Ph., Maier, E.A. and Griepink, B.), Vol. 10. Elsevier, Amsterdam, 237. 

Seby, F., Gautier, M.E, Lespes, G. and Astruc, M. (1997) Selenium speciation in soils after alkaline extraction. Sci. Total Environ., 207, 81-90. 

Martens, DA. and Suarez, D.L. (1997) Selenium speciation of soil/sediment determined with sequential extractions and hydride generation atomic absorption spectrometry. Environ. Sci. Technol., 31, 133. 

Thomson, C.D. (1998) Selenium speciation in human body fluids. Analyst, 123, 827-831. 

Apte, S.C., Howard, A.G., Morris, R.J. and McCartney, M.J. (1986) Arsenic, antimony and selenium speciation during a spring phytoplankton bloom in a closed experimental ecosystem. Mar. Client., 20, 119-130. 

Childress, W.L., Erickson, D. and Krull, I.S. (1992) Trace selenium speciation via high-performance liquid chromatography with ultraviolet and direct-current plasma emission detection. In Element-specific Chromatographic Detection by Atomic Emission Spectroscopy (ed. Uden, PC.). American Chemical Society, Washington, DC, pp. 257-273. 

Fio, J.L. and Fujii, R. (1990) Selenium speciation methods and application to soil saturation extracts from San Joaquin Valley, California. Soil Sci. Soc. Am. J., 54, 363-369. 

Masscheleyn, RH., Delaune, R.D. and Patrick, W.H., Jr (1991) Selenium speciation in aqueous solutions using a hydride generation atomic absorption spectrophotometry technique. Spectrosc. Letts, 24, 307-322. 

Pitts, L., PI. Worsfold, and J. Hill. 1994. Selenium speciation—a flow injection approach employing online microwave reduction followed by hydride generation-quartz furnace atomic absorption spectrometry. Analyst 119 2785-2788. 

Pitts, L., A. Fisher, P. Worsfold, and S.J. Hill. 1995. Selenium speciation using high-performance liquid chromatography-hydride generation atomic fluorescence with on-line microwave reduction. J. Anal. At. Spectrom. 10 519-520. 

Wallschlager, D. and R. Roehl. 2001. Determination of inorganic selenium speciation in waters by ion chromatography-inductively coupled plasma-mass spectrometry using eluant elimination with a membrane suppressor. J. Anal. At. Spectrom. 16 922-925. 

Dietz, C., J. S. Landaluze, P. Ximenez-Embun. 2004. SPME-multicapillary GC coupled to different detection systems and applied to volatile organo-selenium speciation in yeast. J. Anal. At. Spectrom. 19 260-266. 

Liang L., S. Mo, P. Zhang, et al. 2006. Selenium speciation by high-performance anion-exchange chro-matography-post-column UV irradiation coupled with atomic fluorescence spectrometry. J. Chromatogr. A 1118 139-143. 

Selenium speciation has also been measured by a variety of approaches for several different applications. Size exclusion chromatography was coupled with ICP-MS detection to measure selenium speciation (especially Se-containing pro-... 

In environmental and clinical samples, IPC-ICP-MS may be used for selenium speciation [40-42]. Selenite, selenate, and trimethylselenomium were separated by Yang and Jiang [40], using a mobile phase containing 3% methanol and 5 mM PIC-A ion-pairing reagent. An ultrasonic nebulizer was used for improved sample transport, yielding detection limits of 22-74 pg Se for the three species, respectively. Selenite was found to be the most abundant species in urine and unidentified peaks were attributed to selenoaminoacids. 

Michalke, B. and Schramel, P. 1997. Selenium speciation in human milk with special respect to quality control. Biol. Trace Elem. Res. 59, 45-56. 

Selenium Speciation in Selenized Yeast-Based Food Supplements... 

Selenium Speciation in Edible Animal Tissues Reports on Se specia-tion analysis in edible animal tissues have been scarce. Speciation analysis of Se in cod muscle tissue was performed by separating the species using both RP- and SE-HPLC prior to ICP-MS detection. The main Se compound found in enzymatic hydrolysates was selenomethionine [42], This selenocompound was absent in MeOHDHCl extracts, indicating that Se was mainly incorporated into proteins. A number of unidentiFed Se species were also detected in cod muscle tissue, the separated Se compounds being quantised on-line by post-column isotope dilution [42], Soluble Se compounds extracted from muscles of chicken, turkey, duck, ostrich, lamb, cattle, and pig were separated by SEC with ICP-MS detection. Four peaks were observed, but distribution of Se among these peaks varied considerably in tissues from different animal species [86]. 

J. Ruiz Encinar, M. Sliwka-Kaszynska, A. Polatajko, V. Vacchina, J. Szpunar, Methodological advances for selenium speciation analysis in yeast, Anal. Chim. Acta, 500 (2003), 171D183. 

A. Polatajko, M. Sliwka-Kaszynska, M. Demovics, R. Ruzik, J. Ruiz-Encinar, J. Szpunar, A systematic approach to selenium speciation in selenized yeast, J. Anal. Atom. Spectrom., 19 (2004), 114D120. 

M. Kotrebai, M. Birringer, J. F. Tyson, E. Block, P. C. Uden, Selenium speciation in enriched and natural samples by HPLC-ICP-MS and HPLC-ESI-MS with pertiuori-nated carboxylic acid ion-pairing agents, Analyst, 125 (2000), 71D78. 

B. Michalke, P. Schramel, Application of capillary zone electrophoresisDinductively coupled plasma mass spectrometry and capillary isoelectric focusing-inductively coupled plasma mass spectrometry for selenium speciation, J. Chromatogr. A, 807 (1998), 71D80. 

Figure 17.5. Selenium speciation in a human milk sample. The Se elution pattern is that of an SEC column which is directly coupled to an ICP-MS detector. From Bratter et al. [34] with permission from RSC.

B. Michalke, H. Witte, P. Schramel, Developments of a rugged method for selenium speciation, J. Anal. Atom. Spectrom., 16 (2001), 593-597. 

C. Martin, M. Gomez, M. A. Palacios, C. Camara, Evaluation of different types of hydrolysis of proteins for selenium speciation in yeast. Poster presentation at the II. International Conference on Trace Element Speciation in Biomedical, Nutritional and Environmental Sciences, Munich, 7-10 May 2001. 

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