Metal determination and metal speciation by liquid chromatography. A review

Robards, Kevin; Starr, Peter; Patsalides, Emiliòs

doi:10.1039/an9911601247

Cited by 137 publications

(30 citation statements)

References 270 publications

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“…It has been used as a powerful technique for the simultaneous determination of metal ions. 14,15 This method shows the advantages of low cost, excellent selectivity and sensitivity; several groups of ligands such as azo compounds, 16,17 oxine and its derivatives 18,19 and dithiocarbamic acid 20,21 were used as derivatizing agents for the RP-HPLC determination of various metal ions.…”

Section: Introductionmentioning

confidence: 99%

Determination of Cadmium, Zinc, Nickel and Cobalt in Tobacco by Reversed-Phase High-Performance Liquid Chromatography with 2-(8-Quinolylazo)-4,5-diphenylimidazole as a Chelating Reagent

2005

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A sensitive and selective method has been developed for the simultaneous determination of cadmium, zinc, nickel and cobalt. The method is based on the chelation of metal ions with 2-(8-quinolylazo)-4,5-diphenylimidazole (QAI) and the subsequent reversed-phase (RP) high-performance liquid chromatographic separation and spectrophotometric detection of the metal chelates. The chelates were separated on an RP column with acetonitrile-water containing ethylenediamine tetraacetic acid and sodium acetate (pH 7.5). Though Zn(II) and Cd(II) chelates with azo compounds were generally labile in the RP column, these chelates with QAI were successfully detected. When analyses were carried out at 575 nm and at 0.001 absorbance unit full scale, the peak height calibration curves were linear up to 2.0 ng for Cd(II), 2.4 ng for Zn(II), 0.14 ng for Ni(II) and 0.72 ng for Co(II) in 100-µL injections, respectively; the detection limits (3σ, three times of the standard deviation for the blank signal) for Cd(II), Zn(II), Ni(II) and Co(II) were 4.8, 24, 2.4 and 7.2 pg in 100 µL of injected solution, respectively. The proposed method was successfully applied to the analysis of tobacco without any preliminary concentration or separation.

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Section: Introductionmentioning

confidence: 99%

Determination of Cadmium, Zinc, Nickel and Cobalt in Tobacco by Reversed-Phase High-Performance Liquid Chromatography with 2-(8-Quinolylazo)-4,5-diphenylimidazole as a Chelating Reagent

2005

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“…Various low-pressure column chromatography or high-performance liquid chromatography (HPLC) techniques can be used for the separation of transition metals [43]. One of these approaches is ion chromatography that offers excellent results for simultaneous separations of transition metals ions in a complex mixture.…”

Section: Optimization Of Metal Ions Separationmentioning

confidence: 99%

Analysis of water-soluble fraction of metals in atmospheric aerosols using aerosol counterflow two-jets unit and chemiluminescent detection

Vojtěšek

Mikuška

Večeřa

et al. 2012

International Journal of Environmental Analytical Chemistry

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“…On the other hand, the application of high performance liquid chromatography (HPLC) for the separation and determination of metal ions has increased in recent years. [1][2][3][4][5] HPLC is very popular and not as expensive an apparatus; the running cost is very low. In addition, operation of the HPLC is easy, and a more sensitive quantitative analysis is possible by combining precolumn derivatization HPLC with a simple solvent extraction.…”

Section: Introductionmentioning

confidence: 99%

Selective Determination of Iron Ion in Tap Water by Solvent Extraction with 3,4-Dihydro-3-hydroxy- 4-oxo-1,2,3-benzotriazine, Followed by Reversed Phase HPLC

Ichinoki

Fujita

Fujii

2008

Journal of Liquid Chromatography & Related Technologies

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A selective determination method for Iron (Fe) ion in tap water has been developed by solvent extraction, followed by reversed phase HPLC with photometric detection. The Fe(III) ion was quantitatively extracted into chloroform over the pH range of 3.2 to 4.3 as 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine (DHOB) chelate. Job's method indicated that the Fe-DHOB chelate composition was Fe(DHOB) 3 . The molar absorptivity of the Fe-DHOB chelate was calculated as 7.6 Â 10 3 at 430 nm. The extracted Fe-DHOB chelate was then separated on a phenyl column with an eluent of methanol=water=0.05 M DHOB (40:20:40, v=v) and detected at 500 nm. The correlation coefficients of the calibration curves obtained with 5 mL Fe standards were about 0.999 over the range of 10 ng=mL (ppb) to 10 mg=mL (ppm). The detection limit of the Fe ion in 5 mL water was estimated as 7 ppb, which corresponded to 3 times the standard deviation of the blank peak area. Effects of foreign ions on the determination of 0.2 ppm Fe ion were investigated with 57 metal ions. Almost none of the ions interfered, except for V(V), Sn(II), and Ti(IV) ions. The recovery with a spiked tap water sample for 0.5 ppm Fe ion (N ¼ 4) was 99.2 AE 0.9%.

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Metal determination and metal speciation by liquid chromatography. A review

Abstract: view; liquid c h ro m a tog rap h y; me ta I ions; (me ta I) specia ti0 n ; co m plexa ti0 n

Cited by 137 publications

References 270 publications

Determination of Cadmium, Zinc, Nickel and Cobalt in Tobacco by Reversed-Phase High-Performance Liquid Chromatography with 2-(8-Quinolylazo)-4,5-diphenylimidazole as a Chelating Reagent

Determination of Cadmium, Zinc, Nickel and Cobalt in Tobacco by Reversed-Phase High-Performance Liquid Chromatography with 2-(8-Quinolylazo)-4,5-diphenylimidazole as a Chelating Reagent

Analysis of water-soluble fraction of metals in atmospheric aerosols using aerosol counterflow two-jets unit and chemiluminescent detection

Selective Determination of Iron Ion in Tap Water by Solvent Extraction with 3,4-Dihydro-3-hydroxy- 4-oxo-1,2,3-benzotriazine, Followed by Reversed Phase HPLC

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