Enrichment of trace amounts of copper as chelate compounds using a finely divided ion-exchange resin

Abstract

The enrichment of trace amounts of copper as complexes with various chelating agents was examined with the use of finely divided anion-and cation-exchange resins of the macroreticular type. Of the 16 chelating agents studied, bathocuproinedisulphonate (BCS) combined with the use of a finely divided anion-exchange resin was the most effective for the rapid enrichment of copper from large sample volumes. The resin particles holding the copper(1) -BCS complex were collected on a membrane filter and subsequently suspended in a small volume of 0.1 M hydrochloric acid. The resin suspension was then subjected to electrothermal atomisation atomic absorption spectrometry. The method was applied to the determination of copper in sea and river water samples and the results were compared with those obtained by densitometric measurement of the solid-state absorbance of the copper(1) -BCS complex in the resin phase.

Determination of Cadmium and Lead in Tap Water by Graphite-Furnace Atomic Absorption Spectrometry after Preconcentration on a Finely Divided Ion-Exchange Resin as the Pyrrolidinedithiocarbamate Complexes

“…A working solution of 100 mg ml -1 palladium in 0.1 mol l -1 hydrochloric acid was prepared from the stock solution by dilution with water. An anion-exchange resin suspension (ARS) was prepared from a macroreticular-type Diaion PA318 (Mitsubishi Kagaku), according to the reported method: 8 The resin was conditioned in the usual way for preparing the chloride form. The wet resin was crushed in a PTFE mortar with a PTFE pestle to make a slurry, which was then diluted appropriately with water.…”

“…Fine resin particles are well suited for the rapid collection of the desired trace elements from a large sample of aliquots. 8 Since the ion-exchange resin particles have both hydrophilic and hydrophobic properties, they can act as a hydrophilic organic solid in the bulk solution, and can extract species with hydrophobic properties. APDC was selected for the simultaneous extraction of cadmium and lead on the resin particles.…”

Determination of Tin by Resin-Suspension Electrothermal Atomic Absorption Spectrometry after Enrichment as the Complex with Ammonium Pyrrolidinedithiocarbamate

“…Solid analysis by ETAAS, in which a solid sample is placed directly in a furnace or a sample prepared as a slurry or a suspension is injected to a furnace, has been widely used, as summarized in the monograph 1 and the reviews. 2,3 The methods have substantially been applied for the determination of trace elements in solid samples, such as soil, sediment and sludge, however, they have also been applied to water samples after preconcentration of the desired trace element in the precipitate 4,5 or on fine particles such as chelating resins, [6][7][8] activated carbon, 9,10 ion-exchange resins, [11][12][13][14][15] and cobalt(III) oxide. 16,17 So far, a solid sampling procedure was applied to the determination of tin in natural water, 5 in which the tin was preconcentrated by coprecipitation with a Ni-APDC complex and a part of the precipitate was packed in a miniature cup for ETAAS analysis.…”

Photoacoustic Spectrometric Determination of Trace Iron(II) after Preconcentration on a Membrane Filter with a Finely Pulverized Anion-Exchange Resin

“…[3][4][5][6][7][8][9] There are some reagents having a maximum absorption wavelength in the range of nearinfrared rays; for example, 2-nitroso-5-[ethyl-N-(3-sulfopropyl)amino]phenol (Nitroso-ESAP) (752 nm) 5 , 2-nitroso-5-(N-propyl-N-sulfopropylamino)phenol (Nitroso-PSAP) (756 nm) 5 and 2-(5-nitroso-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol (Nitroso-PAPS) (793 nm). 8 Nitroso-PSAP was chosen for use in subsequent studies, because the pH range for the formation of the iron(II)-complex anion is wide.On the other hand, Ohzeki et al 10 proposed a preconcentration technique based on the adsorption of trace amounts of copper as complexes with various chelating agents using finely pulverised anion-and cationexchange resins of the macroreticular type. In our previous studies 11,12 , this preconcentration technique was applied to the determination of ng l -1 levels of gallium in mine-drainage and river-water samples by electrothermal atomic absorption spectrometry.…”

“…On the other hand, Ohzeki et al 10 proposed a preconcentration technique based on the adsorption of trace amounts of copper as complexes with various chelating agents using finely pulverised anion-and cationexchange resins of the macroreticular type. In our previous studies 11,12 , this preconcentration technique was applied to the determination of ng l -1 levels of gallium in mine-drainage and river-water samples by electrothermal atomic absorption spectrometry.…”