Porphyrins as ligands for trace metal analysis by high-performance liquid chromatography

Shi, Zhihong; Fu, Chengguang

doi:10.1016/s0039-9140(96)02068-1

Cited by 39 publications

(32 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The intrinsically high performance of reversed-phase stationary phases developed for the separation of organic compounds is applicable to inorganic cations after precolumn derivatization. Various derivatizing reagents, such as dithiocarbamates, 1-3 8-quinolinol, 4,5 porphyrins, [6][7][8] and heterocyclic azo dyes, [9][10][11] have been developed and examined considering the sample compositions. We have also synthesized a series of heterocyclic azo compounds and extensively studied the retention behavior of the reagent and their metal complexes.…”

Section: Introductionmentioning

confidence: 99%

Bidentate and Tridentate Heterocyclic Azo Compounds Having Long Alkyl Chains as Coating Reagents for Ion Chromatography of Manganese, Zinc, and Cadmium Ions

et al. 2007

View full text Add to dashboard Cite

Bidentate and tridentate heterocyclic azo compounds with and without a long alkyl chain were prepared and examined for cation exchange chromatography of manganese, zinc, and cadmium; these ions could not be separated by reversed phase HPLC following precolumn derivatization with heterocyclic azo compounds owing to the dissociation of the complexes. The newly prepared azo compounds having a long alkyl chain favorably orientate in the reversed-phase stationary phase such that the coordinating parts of the ligand may make contact with metal ions in the mobile phase. Bidentate ligands showed sharp peaks but almost no resolution of manganese and cadmium. A tridentate ligand strongly retained all the three metal ions, which could be separated within 10 min by a competing ligand and by optimizing the pH.

show abstract

Section: Introductionmentioning

confidence: 99%

Bidentate and Tridentate Heterocyclic Azo Compounds Having Long Alkyl Chains as Coating Reagents for Ion Chromatography of Manganese, Zinc, and Cadmium Ions

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Porphyrin reagents have, therefore, been widely applied to the simultaneous determination of metal ions. [5][6][7][8][9][10][11][12][13] However, for the simultaneous determination of heavy metal ions, the traditional RP-HPLC techniques have some disadvantages. On the one hand, the routine reserved phase chromatographic column has a narrow pH range of 2-8.…”

Section: Introductionmentioning

confidence: 99%

“…The column is not suitable for the separation of porphyrin chelates of heavy metal ions, which are only stable in a weak alkaline medium. [5][6][7] On the other hand, the metal-porphyrin chelates have a narrow absorption band. Using a single wavelength detector for the simultaneous monitoring of several metal chelates will not produce high sensitivity, least of all for lead ion.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Tin, Nickel, Lead, Cadmium and Mercury in Cigarette Material by Solid Phase Extraction and HPLC

Hu¹,

Yang

et al. 2003

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

A new method for the simultaneous determination of heavy metal ions in cigarette material by microwave digestion and reversed-phase high-performance liquid chromatography (RP-HPLC) has been developed. The cigarette material was digested by microwave digestion. Lead, cadmium, mercury, nickel and tin ions in the digested samples were pre-column derivatized with tetra-(2-chlorophenyl)-porphyrin (T 2 -CPP) to form color chelates, which were then enriched by solid phase extraction with a C 18 cartridge. The chelates were separated on a Waters Xterra TM RP 18 column by gradient elution with methanol (containing 0.05 mol/L pyrrolidine-acetic acid buffer salt, pH = 10.0) and acetone (containing 0.05 mol/L pyrrolidine-acetic acid buffer salt, pH = 10.0) as mobile phase at a flow rate of 0.5 mL/min and analyzed with a photodiode array detector from 350-600 nm. The detection limits of lead, cadmium, mercury, nickel and tin were 4, 3, 3, 8, and 5 ng/L, respectively, in the original samples. This method was afforded good results.

show abstract

“…Many kinds of reagent, such as 8-quinolinol derivatives, 1-3 azo dyes, [4][5][6][7][8] β-diketones, 9-10 hydrazones, [11][12][13] dithiocarbamate, [14][15][16][17] cyclohexanediamine, [18][19] porphyrin [20][21][22] and the like, have been examined as pre-column derivatization regents. Several review articles have appeared concerning this approach.…”

mentioning

confidence: 99%

“…Several review articles have appeared concerning this approach. [20][21][22][23][24][25][26][27][28][29][30][31] Among the various reagents, porphyrins showed the advantages that they have strong complexing ability and their metal chelates have high sensitivity and stability. [20][21][22][23][24][25] Due to these facts, porphyrin reagents have received even-more attention and are widely applied to the simultaneous determination of metal ions.…”

mentioning

confidence: 99%

Determination of Lead, Cadmium and Mercury in Microwave- digested Foodstuffs by RP-HPLC with an On-line Enrichment Technique

Huang

Yang

et al. 2003

ANAL. SCI.

View full text Add to dashboard Cite

A new method for the simultaneous determination of lead, cadmium and mercury ions in microwave-digested foodstuffs by reversed-phase high-performance liquid chromatography combined with on-line enrichment technique has been developed. The foodstuff samples were digested by microwave digestion. The lead, cadmium and mercury ions can be precolumn derivatized with 5,10,15,20-tetrakis(3-aminophenyl)porphine (T3APP) to form color chelates; then, the Hg-T3APP, Cd-T3APP and Pb-T3APP chelates can be enriched and separated on a valve switching HPLC system combined with on-line enrichment technique. The linearity ranges are 0.01 -120 µg/l for each metal ion. The detection limits (S/N = 3) of lead, cadmium and mercury are 1.2 ng/l, 0.5 ng/l and 0.8 ng/l, respectively. This method was applied to the determination of lead, cadmium and mercury in foodstuffs with good results.

show abstract

Porphyrins as ligands for trace metal analysis by high-performance liquid chromatography

Cited by 39 publications

References 30 publications

Bidentate and Tridentate Heterocyclic Azo Compounds Having Long Alkyl Chains as Coating Reagents for Ion Chromatography of Manganese, Zinc, and Cadmium Ions

Bidentate and Tridentate Heterocyclic Azo Compounds Having Long Alkyl Chains as Coating Reagents for Ion Chromatography of Manganese, Zinc, and Cadmium Ions

Simultaneous Determination of Tin, Nickel, Lead, Cadmium and Mercury in Cigarette Material by Solid Phase Extraction and HPLC

Determination of Lead, Cadmium and Mercury in Microwave- digested Foodstuffs by RP-HPLC with an On-line Enrichment Technique

Contact Info

Product

Resources

About