Determination of selenite, selenate and selenomethionine by ion chromatography, microwave digestion and HGAAS

Ellend, N.; Rohrer, Cynthia; Grasserbauer, M.; Broekaert, J. A. C.

doi:10.1007/s0021663560099

Cited by 17 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For hydride generation of selenium, the compounds must exist as selenous acid. 29 Selenic acid is inert to HG. 5,13,16,19,22,29 Our investigation for selenic acid (inactive to HG) agreeing well with all reported findings.…”

Section: Effect Of Hydrochloric Acid Tube Length and Sodium Hydroxidementioning

confidence: 99%

See 1 more Smart Citation

Behaviour of selenium compounds in FI-HG-AAS

Chatterjee¹,

Irgolic²

1998

Anal. Commun.

View full text Add to dashboard Cite

The borohydride active volatile compound formation potential of twelve selenium compounds [selenous acid, selenic acid, selenocystine (Secys), selenohomocystine (Sehcys), selenomethionine (Semet), selenoethionine (Seet), trimethylselenonium iodide (TmSe), selenocystathionine (Secystha), selenocystamine (Secysta), selenourea (Seur), selenocholine (Sech), and dimethyl(3-amino-3carboxy-1-propyl)selenonium iodide (DmpSe)] were investigated in a FI-HG system with different sodium borohydride concentrations (0.3% in 0.1% sodium hydroxide, and 0.5, 0.7, and 1.0% in 0.2% sodium hydroxide) in the presence of 3 M hydrochloric acid using an atomic absorption spectrometer as selenium-specific detector. Percentage recoveries with respect to selenous acid of selenic acid, Secys,

show abstract

Section: Effect Of Hydrochloric Acid Tube Length and Sodium Hydroxidementioning

confidence: 99%

“…29 Selenic acid is inert to HG. 5,13,16,19,22,29 Our investigation for selenic acid (inactive to HG) agreeing well with all reported findings. TmSe and Sech are the major metabolites of selenium in urine.…”

Section: Effect Of Hydrochloric Acid Tube Length and Sodium Hydroxidementioning

confidence: 99%

Behaviour of selenium compounds in FI-HG-AAS

Chatterjee¹,

Irgolic²

1998

Anal. Commun.

View full text Add to dashboard Cite

show abstract

“…The residual fraction represented the portion of metals bound to silicate lattice or crystalline iron and manganese oxides. That is why, the metals in nonresidual fraction were considered to be more bioavailable than metals associated with the residual fraction (Ellend et al 1996;Merrington et al 2003).…”

Section: Physicochemical Properties Of Soilmentioning

confidence: 99%

Speciative distribution and bioavailability of metals in agricultural soils receiving industrial wastewater

Tariq

Bashir

2011

Environ Monit Assess

View full text Add to dashboard Cite

In order to assess the metal pollution status of agricultural lands of Mandi Bahauuddin receiving industrial wastewater, 35 top soil samples were investigated for the determination of selected metal levels, i.e., Fe, Cu, Cd, Cr, Ca, Ni, and Pb by flame atomic absorption spectroscopy under optimum analytical conditions. The distribution of these metals in different operationally defined chemical fractions was also determined by using the sequential extraction technique. The highest mean total concentration was found for Fe while the least one was observed for Pb. All the studied metals were found to be present at levels much enhanced than national and international standards. Moreover, most of the metals were distributed principally in residual fraction with the exception of Ni which was found to be associated mainly with oxidizable fraction. The significant correlations were observed between Fe-Mn oxide-bound and residual fractions and exchangeable and oxidizable fractions for most of the metals. The highest mobility was exhibited by Ni that evidenced its enhanced bioavailability in the soil. The multivariate statistical analyses in terms of principal component analysis (PCA) and cluster analysis (CA) revealed multiple sources for various geochemical fractions of different metals. CA also revealed that the nonresidual fractions of most of the metals were very closely associated while PCA presented a distinctive behavior of Ca in the soil. It was therefore suggested that in order to avoid the metal contamination arising from industrial wastewater, appropriate remediation strategies must be adopted.

show abstract

“…9 A number of reports on the coupling of this technique with chromatography for selenium speciation have already been published. [10][11][12][13] Prior to HG all selenium species must be converted to selenite, as this is the only species readily forming volatile SeH 2 when reacted with borohydride. It should however be noted that other selenium species than selenite were recently reported to form volatile selenium when reacted with sodium borohydride and therefore HG can not be considered to be fully selective for selenite.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of ion-chromatography microwave assisted on-line species conversion hydride generation atomic absorption spectrometry for selenium speciation analysis of biological material

Johansson

Bordin

Rodríguez

2000

Analyst

View full text Add to dashboard Cite

A method for selenium speciation based on ion-chromatography (IC) microwave (MW) assisted on-line species conversion hydride generation (HG) atomic absorption spectrometry (AAS) is described. The conversion of selenium species into selenite was achieved by using hydrobromic acid and bromate. A potential interferent originating from the reagents was identified. Multivariate optimization of the IC-MW-HGAAS system was undertaken and the results show that the HBr/BrO 3 2 ratio is a very important parameter, which should be carefully controlled both to obtain a high conversion efficiency and to diminish the interferent. The feasibility of the IC-MW-HGAAS system for real samples is demonstrated by the application of selenium speciation in extracts of the certified reference material CRM 402. The system is shown to be sensitive to interferences but the detection capability is good, relative detection limits being 1.0-1.6 ng g 21 (based on a 50 mL injection volume) for the species investigated: selenomethionine, selenite, selenate and selenocystine. Selenate was quantified in the CRM 402 extract at a level of ≈ 1.5 mg g 21 corresponding to ≈ 22% of the total selenium content in the material. The method described is concluded to be operationally defined because of the extraction procedure used. Experimental ReagentsAll solutions were prepared with Milli-Q Plus 185 (Millipore, Millford, MA, USA) water resistivity (18.2 MΩcm). The 15 mmol L 21 carbonate eluent for ion-chromatography was

show abstract

Determination of selenite, selenate and selenomethionine by ion chromatography, microwave digestion and HGAAS

Cited by 17 publications

References 8 publications

Behaviour of selenium compounds in FI-HG-AAS

Behaviour of selenium compounds in FI-HG-AAS

Speciative distribution and bioavailability of metals in agricultural soils receiving industrial wastewater

Feasibility study of ion-chromatography microwave assisted on-line species conversion hydride generation atomic absorption spectrometry for selenium speciation analysis of biological material

Contact Info

Product

Resources

About