Metal species determination by ion chromatography

Sarzanini, Corrado; Bruzzoniti, Maria Concetta

doi:10.1016/s0165-9936(01)00071-1

Cited by 80 publications

(55 citation statements)

References 32 publications

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“…Anion-exchange chromatography is also compatible with ICP-MS because the mobile phase does not contain either organic solvents or ion-pairing reagents [32]. Hence, nonsuppressed anion-exchange chromatography was used for the separation of the metal -EDTA complexes which is a more common procedure when compared to that of suppressed IC, where these species are retained on the column by anion exchange and eluted by a competitive anion in the mobile phase [33].…”

Section: Ic Separation Of Metal -Edta Complexesmentioning

confidence: 99%

“…The retention of metal -EDTA complexes can be manipulated by making adjustments to the mobile phase concentration, the type of competing anion and the solution pH [32,33]. However, mobile phases containing sodium cause deposits to form upon the sampler and skimmer cones of the ICP-MS instrument which decrease the plasma stability and can lead to considerable drift in signal after prolonged use [34].…”

Section: Ic Separation Of Metal -Edta Complexesmentioning

confidence: 99%

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Speciation of metal–EDTA complexes by flow injection analysis with electrospray ionization mass spectrometry and ion chromatography with inductively coupled plasma mass spectrometry

Chen¹,

Sun

et al. 2008

J of Separation Science

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Original PaperSpeciation of metal-EDTA complexes by flow injection analysis with electrospray ionization mass spectrometry and ion chromatography with inductively coupled plasma mass spectrometry Flow injection analysis (FIA) with ESI-MS and ion chromatography (IC) with inductively coupled plasma-MS (ICP-MS) and their MS spectral showed that these metal -EDTA complexes were present in solution. Based on the ESI-MS, ion chromatographic separation and ICP-MS detection of these complexes are possible because IC-ICP-MS requires stable metal -EDTA complex during the chromatographic separation. The separation of these metal -EDTA complexes was achieved on an anion-exchange column with a mobile phase containing 30 mM NH 4 (HPO 4 ) 2 at pH 7.5 within 7 min with ICP-MS providing element specific detection. The ICP-MS LODs for the metal -EDTA were in the range of 0.1 -0.5 lg/L with the exception of Fe (15 lg/L). The proposed method was a simple procedure for sample processing, using direct injection of sample without removal of sample matrix and was successfully applied to the determination of metal -EDTA complexes in real samples. IntroductionEDTA is a chelating agent which has the potential to perturb the natural speciation of metals, to influence metal bioavailability [1], and to remobilize metals from sediments and aquifers [2]. Chelating agents occur in natural waters predominantly as metal complexes. There are many studies emphasizing the importance of chelation on metal bioavailability, plant uptake, toxicity, transport, adsorption, distribution, and fate [3]. However, the identification and detection of these metal complexes in environmental sample is still a significant analytical challenge because of their structural similarities and presence at low concentrations in environmental matrices [4]. Separation of these complexes is therefore an important step in the development of an analytical method suitable for the detection of metal -EDTA complexes in environmental samples.CE and ion chromatography (IC) are the main separation methods used for the determination of metal -aminopolycarboxylic complexes. Using the CE approach, metal complexes with nitrilotriacetic acid (NTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), EDTA, and diethylenetriaminepentaacetic acid (DTPA) were all successfully separated using either CZE [5 -7] or MEKC [8] with UV detection. LODs of 2 -500 lM were obtained using these CE methods, which are usually not sensitive enough for the analysis of trace levels of these complexes in environmental samples. As an alternative to CE, IC is often used to determine metal -EDTA complexes, based on the precolumn complexation of the chelating agents with metals. The separation of these complexes by ionpairing [9 -12] and ion-exchange chromatography [13 -15] has been accomplished with conductivity or UV/Visible detection, but these detectors are nonselective and it is therefore often impossible to identify all metal -EDTA complexes in complex matrices. To address these problems, the separation...

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Section: Ic Separation Of Metal -Edta Complexesmentioning

confidence: 99%

Section: Ic Separation Of Metal -Edta Complexesmentioning

confidence: 99%

Speciation of metal–EDTA complexes by flow injection analysis with electrospray ionization mass spectrometry and ion chromatography with inductively coupled plasma mass spectrometry

Chen¹,

Sun

et al. 2008

J of Separation Science

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“…In both cases, chloride did not interfere with arsenic speciation because it eluted after the main arsenic species. As(V) was not detected as the eluting power was too weak [25][26][27] which limits the usefulness of this eluent system. In addition, the retention time for the target ions was different for both eluents.…”

Section: Eluent Systemsmentioning

confidence: 97%

“…In anion-exchange chromatography, analyte retention time is dependent on eluent composition, including the nature of the competing ions, eluent concentration, and pH [25][26][27]. Of these, the nature of the competing ions is the main parameter in determining whether target ions are eluted from the column by competitive ion exchange with the eluent anion.…”

Section: Eluent Systemsmentioning

confidence: 99%

“…In this case, 40 Ar 35 Cl + was formed due to the high chloride concentration in the matrix and interfered with the determination of As(V). In addition, this eluent system contained EDTA, which is commonly used as an eluent during IC of anions because it is a powerful competitive ion [25][26][27]. However, EDTA can also form a complexe with metal ions in the matrix to form anionic complexes that can also be retained on the anion-exchange…”

Section: Eluent Systemsmentioning

confidence: 99%

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Speciation of arsenic by ion chromatography inductively coupled plasma mass spectrometry using ammonium eluents

Chen¹,

Akter

Rahman

et al. 2006

J of Separation Science

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Original PaperSpeciation of arsenic by ion chromatography inductively coupled plasma mass spectrometry using ammonium eluents A method based on ion chromatography (IC) and inductively coupled plasma MS (ICP-MS) was developed for the speciation of arsenic in water and soil extracts. An anion-exchange column (G3154A/101) was used to separate As(III), As(V), dimethylarsinic acid (DMA), and monomethylarsonic acid (MMA) with excellent resolution. Various ammonium salts, including NH 4 H 2 PO 4 , (NH 4 ) 2 HPO 4 , (NH 4 ) 2 CO 3 , and NH 4 HCO 3 , were examined as eluents to reduce matrix interference from chloride and to solve clogging problems. The best arsenic speciation was obtained within 9 min with excellent resolution and without interference from high chloride concentrations using an eluent containing 7.5 mM (NH 4 ) 2 HPO 4 at pH 7.9. The detection limits for the target arsenic species ranged from 0.1 to 0.4 lg/L with direct injection of sample without matrix elimination. The proposed method was effectively demonstrated by determining arsenic species in contaminated waters and soils of Bangladesh.

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Application of Organometallic Speciation in Clinical Studies

Yuan

Sun

et al. 2012

Analytical Techniques for Clinical Chemistry

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Metal species determination by ion chromatography

Cited by 80 publications

References 32 publications

Speciation of metal–EDTA complexes by flow injection analysis with electrospray ionization mass spectrometry and ion chromatography with inductively coupled plasma mass spectrometry

Speciation of metal–EDTA complexes by flow injection analysis with electrospray ionization mass spectrometry and ion chromatography with inductively coupled plasma mass spectrometry

Speciation of arsenic by ion chromatography inductively coupled plasma mass spectrometry using ammonium eluents

Application of Organometallic Speciation in Clinical Studies

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