Preconcentration of Trace Metals in Seawater Matrix for Inductively Coupled Plasma Atomic Emission Spectrometry

Abstract

In this study, a two-step preconcentration procedure is proposed to be used in conjunction with ICP-AES for the determination of trace metals in seawater. The two-step preconcentration involves extraction of trace metals from seawater with dithiocarbamate (DTC) into chloroform followed by back-extraction with a Pd2+ solution. The extraction could concentrate the trace metals by forming a chelate with DTC with a high enrichment factor obtained with the large phase volume ratio. The back-extraction agent Pd2+ is selected because the extraction constant of Pd(DTC)2 is the largest and much higher than most of the other metal dithiocarbamates.The enrichment factor could be further enhanced at the back-extraction step with a large phase volume ratio. Finally, the aqueous solution containing simply the enriched metals and some of the nonreacted Pd2+ was taken for ICP-AES.

Determination of Trace Elements by Inductively Coupled Plasma-Atomic Emission Spectrometry (Icp-Aes) After Preconcentration on a Support Impregnated With Piperidine Dithiocarbamate

“…This drawback can be overcome by a combination of a suitable preconcentration technique with subsequent ICP-AES determination. Preconcentration methods that can be used for water samples are solvent extraction, coprecipitation, resin chelation, and various chromatographic techniques (1)(2)(3)(4)(5)(6)(7)(8). These preconcentration methods provide low detection limits and also helps to avoid matrix interferences in the analysis of real samples.…”

Fast, Selective Removal and Determination of Total Bismuth (III) and (V) in Water by Procaine Hydrochloride Immobilized Polyurethane Foam Packed Column Prior to Inductively Coupled Plasma - Optical Emission Spectrometry

“…bis (2, 4, 4-trimethyl pentyl) monothiophosphinic acid [11], pyrolidine dithocarbamate [12] etc has received considerable attention. However, these methods are too expensive, suffer from the use of large volumes of toxic organic solvents, and time-consuming.…”

Preconcentration of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with Na-DDTC and Determination by Electrothermal Atomic Absorption Spectrometry (ET-AAS)

“…Preconcentration addresses both of these problems. There are a lot of methods for preconcentration and separation, such as liquidliquid extraction [19][20][21] and solid phase extraction.…”