Thin Layer Chromatography and High Pressure Liquid Chromatography of Metal Chelates

Steinbrech, B.

doi:10.1080/01483918708074190

Cited by 25 publications

(3 citation statements)

References 70 publications

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“…It has, however, been used to separate metal chelates, such as dithiocarbamates, that are soluble in the non-polar mobile phases (Steinbrech, 1987).…”

Section: Separation Processesmentioning

confidence: 99%

Hybrid Methods of Speciation

Greenway¹

2002

Chemical Speciation in the Environment

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“…It has, however, been used to separate metal chelates, such as dithiocarbamates, that are soluble in the non-polar mobile phases (Steinbrech, 1987).…”

Section: Separation Processesmentioning

confidence: 99%

Hybrid Methods of Speciation

Greenway¹

2002

Chemical Speciation in the Environment

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“…An alternative approach described here is reversed-phase high-performance liquid chromatography (RP-HPLC) of metal chelates, which is of great advantage in terms of sensitivity, selectivity, and cost-effectiveness ( − ). In our continuing studies on the precolumn (off-line) chelation methods of metal ions in the RP-HPLC systems ( − ), the attractive features of this system have emerged; the kinetically controlled selectivity of metal chelates in an HPLC column and the extremely high sensitivity with the minimized background fluctuation resulted from the base-line resolution of an excess reagent added at the off-line chelation stage ().…”

Section: Introductionmentioning

confidence: 99%

High-Performance Liquid Chromatographic Methods for the Specific Monitoring of Nickel and Vanadium in Municipal Air at the Nanogram per Cubic Meter Levels

Iki

Irie

Hoshino

et al. 1996

Environ. Sci. Technol.

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In order to develop the municipal air surveillance systems, Ni and V in airborne particulates, which are emitted by combustion of fossil fuel, can be employed as suitable index species. The ultra-trace determinations of these elements down to subnanograms per cubic meter of air in airborne particulate matrices have been successfully achieved with a coupled scheme of reversed-phase liquid chroma tography and a spectrophotometric detection. The precolumn (off-line) chelation reagents, aroylhydrazones having O,N,O and N,N,O donor sets are appropriate to V and Ni, respectively, in terms of the specificity for these ions, which assures extraordinary suitability to the airborne particulate matrices being free from the interferences notably by Al and Fe. The detection limits (3 σ basis) of the methods reach down to 10 pg for V and 30 pg for Ni in 0.1-mL injections. The monitoring data of these elements in air samples collected in Sendai City, Japan, are reported. Even in less polluted air, V is accurately detected in the range of 1.5−3.5 ng/m3 with a short sampling period for only 24 h (ca. 30 m3 air). The very low detection limit of 0.3 ng of V/m3 is demonstrated for the continuous monitoring with such small sampling volume.

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“…An attractive approach is to add an appropriate complexing reagent to the sample and separate the metal complexes by liquid chromatography. Several review articles have been published on this technique (1)(2)(3)(4)(5)(6). Most reagents form complexes that are insoluble in water and require a solvent extraction step prior to the chromatographic separation.…”

mentioning

confidence: 99%