Recent applications of high-performance liquid chromatography to the analysis of metal complexes

Wang, Peng; Lee, Hian Kee

doi:10.1016/s0021-9673(97)00839-x

Cited by 64 publications

(22 citation statements)

References 181 publications

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“…Both isomers were separated and the fractions collected were checked by UV-visible spectroscopy. Each portion containing the isolated complex was concentrated to dryness by rotary evaporation and stored under vacure The visible absorption spectra and molar absorptivity coefficients obtained are in agreement with standard values [11,17,19,25,27, 281 (+4%). The yidd was 82%.…”

Section: Methodssupporting

confidence: 64%

“…Many studies employing this bidentate amine ligand, especially those involving ruthenium as metal center, have contributed to the better understanding of kinetics, mechanistic studies [11,[17][18][19][20][21], biochemistry [8,11,22] and photochemistry [23][24]. Since Chan's report [25], the cis and dures [ 17-19, 23 -26], with low yields and reaction time of about three days.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and the reversed-phase HPLC analysis ofcis andtrans-dichlorobis(ethylenediamine-ruthenium) chloride isomers

2003

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SummaryIn thTs work we report the monitorTng of the synthesis of cis and tran~dTchlorobTs(ethylenedia mine)ruthenium chloride isomers by HPLC. The preparation of the cis and trans complexes were as descrTbed in the literaturewTth modifications arisTng from reversed-phase HPLC results. The cis and trans complexes were separated wth retention tTmes of 3.0 mTn and 5.5 mTn respectively usTng an ODS column (250 mmx 4.6 mm i.d., 5 tim partTcles, Alhech)and methanol/water 45/55 ratTo as mobile phase. According to HPLC results the reaction time to completion is 48 h and not 72 h as previously described. The shorter time resulted in better yield 82% and reduced by-products.

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Section: Methodssupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Synthesis and the reversed-phase HPLC analysis ofcis andtrans-dichlorobis(ethylenediamine-ruthenium) chloride isomers

2003

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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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“…Among such metal chelates, GC is sensitive for b-diketones, monothioacetylacetone and its derivatives [1,2], bis-and tetradentate ketoamine Schiff bases [3][4][5][6][7][8][9], diethyldithiocarbamate [10], pentamethylenedithiocarbamate [11], dialkyldithiophosphate [1], and metalloporphyrins [12,13]. Dithiocarbamates have been extensively studied and reported as complexing reagents for a large number of metal ions for solvent extraction, spectrophotometric, and HPLC determination of metal ions [14][15][16][17][18][19]. They form coordinatively saturated, neutral metal chelates, extractable in organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Capillary gas chromatographic analysis of pyrrolidinedithiocarbamate metal chelates

Laghari

Khuhawar²,

Zardari

2007

J of Separation Science

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Pyrrolidinedithiocarbamate (PDTC) chelates of Zn(II), Cu(II), Ni(II), Co(III), Fe(III), Mn(II), Cr(III), and VO(II) were analysed by capillary GC on a DB-1701 column (30 m x 0.25 mm id) with flame ionisation detection (FID). Linear calibrations were attained within "1-30 microg/mL" for Ni(II), Fe(III), Mn(II), Cr(III), Cu(II), and VO(II), and within "2-50 microg/mL" for Co(III) and Zn(II). The limits of detection were in the "150-500 ng/mL" range, corresponding to 15-50 pg amounts reaching the FID system. The optimised method was applied to the determination of Cu(II) and Ni(II) in coins, and that of Zn(II), Cu(II), Ni(II), Fe(III), Mn(II), Cr(III), and VO(II) in pharmaceutical preparations with relative standard deviations within 1.1-5.2%. The results obtained are in good agreement with sewage water samples and the declared values for the pharmaceutical formulations, or with the results of AAS of metal contents in coins, pharmaceutical preparations, and sewage water samples.

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Recent applications of high-performance liquid chromatography to the analysis of metal complexes

Cited by 64 publications

References 181 publications

Synthesis and the reversed-phase HPLC analysis ofcis andtrans-dichlorobis(ethylenediamine-ruthenium) chloride isomers

Synthesis and the reversed-phase HPLC analysis ofcis andtrans-dichlorobis(ethylenediamine-ruthenium) chloride isomers

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

Capillary gas chromatographic analysis of pyrrolidinedithiocarbamate metal chelates

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