Masking, chelation, and solvent extraction for the determination of sub-parts-per-million levels of trace elements in high iron and salt matrixes

Williams, Mary Carol.; Cokal, E.J.; Niemczyk, Thomas M.

doi:10.1021/ac00298a061

Cited by 20 publications

(11 citation statements)

References 20 publications

(26 reference statements)

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“…We first searched for an appropriate masking agent: several masking agents for Fe and/or Al have been reported. [19][20][21][22][23] Citrate and Tiron (4,5-dihydroxybenzene-1,3-disulfonic acid) were used for the solvent extraction of trace metals from an Fe-rich aqueous solution. 19 CyDTA 20 and deferoxamine 21 were also used as masking agents for Al and Fe in order to detect fluoride ions.…”

Section: Selective Separation Of Trace Metalsmentioning

confidence: 99%

“…[19][20][21][22][23] Citrate and Tiron (4,5-dihydroxybenzene-1,3-disulfonic acid) were used for the solvent extraction of trace metals from an Fe-rich aqueous solution. 19 CyDTA 20 and deferoxamine 21 were also used as masking agents for Al and Fe in order to detect fluoride ions. Fluoride ions are used as a masking agent for Fe 3+ in steel analyses.…”

Section: Selective Separation Of Trace Metalsmentioning

confidence: 99%

“…This result shows that deferoxamine is an excellent masking agent for Al 3+ and Fe 3+ . Furthermore, fluoride and citrate, which are known as strong masking agents for Al 3+ and Fe 3+ , 19,22 were also tested. For fluoride, all metals including Al 3+ and Fe 3+ were bound to the chelate column even in a 0.2 mol dm À3 solution of NaF.…”

Section: Selective Separation Of Trace Metalsmentioning

confidence: 99%

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Determination of divalent trace metals in a soil sample using electrospray ionization mass spectrometry

2012

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Section: Selective Separation Of Trace Metalsmentioning

confidence: 99%

Section: Selective Separation Of Trace Metalsmentioning

confidence: 99%

Section: Selective Separation Of Trace Metalsmentioning

confidence: 99%

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Determination of divalent trace metals in a soil sample using electrospray ionization mass spectrometry

2012

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“…The utilisation of solvent-solvent extraction in one procedure for both separating a number of trace metals from interfering salts and for enhancing the sensitivity from 10 to 100 times is very valuable in safeguarding the quality of analytical data, especially if results from widely differing matrices have to be accurate. [2][3][4] Despite the obvious advantages of automating solvent extraction of procedures only a few examples of combined solvent extraction and automation of the graphite furnace have been reported. [5][6][7] In this paper, the design and characteristics of a system for the automated determination of cadmium (Cd), cobalt (Co), copper (Cu), lead (Pb), nickel (Ni) and zinc (Zn) at ppb levels in aqueous samples and acid digests of soils and biological materials is described.…”

Section: Introductionmentioning

confidence: 99%

Automated on-line solvent extraction and AAS-graphite furnace determination of trace metals in difficult matrices

Mosbæk

Holm

Tjell

2003

J. Anal. At. Spectrom.

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“…There are limitations in choosing other buffers. For example, citrate forms strong complexes with Cr and Fe a t a certain pH range (7,11) and phosphate precipitates with Ca and Mg a t pH above 6 (1).…”

Section: Introductionmentioning

confidence: 99%

Maleic acid/ammonium hydroxide buffer system for preconcentration of trace metals from seawater

Pai¹,

Chen²,

Wong³

et al. 1990

Anal. Chem.

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The differential binding of two chiral analytes on two different Pirkle phases was simulated with atomistic modeling. These results were described and compared with earlier work. The results from this work taken together with our earlier results allow us to state the following: (1) The computational protocol we employ seems to be valid; we always predict the correct retention order and we can qualitatively determine separability factors.(2) The intermolecular potential energy surfaces describing the binding of analytes to these CSP's are very flat. Binding to the front and back sides of CSPl and CSP3 is possible but a slight preference for binding to the sterically less encumbered face is evident. Generally speaking both R and S analyte bind to the same region. There is no evidence suggesting one analyte binds selectively to one portion of the CSP while the mirror image binds elsewhere.(3) The fragments on CSPl most responsible for holding the diastereomeric complexes together usually are the DNB moiety and the amide spacer linkage while the naphthylamine is most responsible in CSP3. These fragments do the majority of the work holding the complexes together regardless of the chirality of the substrate. Again we conclude that one fragment does not selective bind one enantiomer while another fragment binds its mirror image. (4) The fragment bearing the stereogenic center is not the dominant fragment in chiral recognition. This is consonant with Mislow's views (14) that the entire molecule is chiral, not just its asymmetric center.(5) We conclude that simplification of the myriad of pairwise-additive interactions between molecules into a more manageable caricature or cartoon generally support the chiral recognition models developed by Pirkle.

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Masking, chelation, and solvent extraction for the determination of sub-parts-per-million levels of trace elements in high iron and salt matrixes

Cited by 20 publications

References 20 publications

Determination of divalent trace metals in a soil sample using electrospray ionization mass spectrometry

Determination of divalent trace metals in a soil sample using electrospray ionization mass spectrometry

Automated on-line solvent extraction and AAS-graphite furnace determination of trace metals in difficult matrices

Maleic acid/ammonium hydroxide buffer system for preconcentration of trace metals from seawater

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