Abstract
The research on the determination of Cd(II) metal in river and seawater samples using the Adsortive Cathodic Stripping Voltammetry (AdCSV) method has been done. In order to increase the sensitivity and selectivity of Cd(II) measurement, it is necessary to determine the optimum condition for the variation of potential ligand accumulation, accumulation time, pH and optimum ligand concentration. It is also determined the accuracy and precision of the method used by determining the value of the relative standard deviation (SDR), as well as the recovery value. The result obtained is chalcone as the optimum ligand, the optimum accumulation potential is -0.1 V, the optimum accumulation time is 60 seconds, the optimum solution pH is 6, and the optimum chalcone concentration is 0.5 mM. The relative standard deviation value is 4.27%, the recovery value is 98.31%. The application of the VSAd method to water sample results the concentration of Cu(II) metal in the sample of Bangek river, Indonesia is 4.778 g/L and seawater in Teluk Kabung, Indonesia is 5.189 g/L.
Highlights
It is widely recognized that cadmium is the most significant environmental pollutant which is highly toxic to the immune, nervous, gastro-intestinal and reproductive systems of animal and human [1]
This study aims to determine the optimum condition for deposition potential, deposition time, pH, concentration of supporting electrolyte (NH 4 Cl), and ligand concentration in the determination of Cd(II) metal using the Adsorptive Cathodic Stripping Voltammetry (AdCSV) method
Standard solution of metal Cd(II) 1000 mg/L, eriochrome blue black R as metal ion Cd(II) complexing, NH 4 Cl as supporting electrolyte, aquabides solvent and samples taken from the Bangek River and Teluk Kabung, Indonesia added with HNO 3 65% with a ratio of 1: 1000
Summary
It is widely recognized that cadmium is the most significant environmental pollutant which is highly toxic to the immune, nervous, gastro-intestinal and reproductive systems of animal and human [1]. Heavy metal has been widely analyzed using various methods such as colorimetry [3], atomic absorption spectrometry (AAS) [4] atomic fluorescence spectrometry [5], Surface enhanced Raman spectrometry (SERS) [6] ion chromatography [7], extensively inductively coupled plasma optical emission spectrometry (ICP-OES) [8] and inductively coupled plasma mass spectrometry (ICP-MS) [9]. The above techniques have number of drawbacks such as difficult and expensive operations, and requires complicated instruments. This method is not suitable for field analysis [10]. In doing so we need a simple, selective, sensitive, easy and relatively inexpensive method for the determination of Cd (II) metal
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