Related Experiment Video
Updated: Jun 28, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
Published on: December 17, 2018
Solvent extraction of cadmium as a previous step for its determination in biological samples by electrothermal
J M Almendro1, C B Ojeda, A G de Torres
1Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, 29071 Málaga, Spain.
Abstract:
A method is proposed for the solvent extraction of cadmium using 1,5-bis(di-2-pyridylmethylene)thiocarbohydrazide (DPTH) as extractant. The optimum extraction conditions were evaluated from a critical study of the effect of pH, concentration of extractant, shaking time and ionic strength. The maximum volume ratio of the aqueous to organic phase was 30:1 for a single-stage extraction of99-100% of the metal ion. The detection limit is 0.01 ng/ml cadmium, and the calibration is linear from 0.1 to 5 ng/ml. The relative standard deviation for 10 replicate measurements is 1.8% for 2 ng/ml cadmium. The extraction method was applied to the determination of cadmium in some biological materials using graphite furnace atomic absorption spectrometry.
Related Concept Videos
Atomic Absorption Spectroscopy: Lab
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
Atomic Absorption Spectroscopy: Atomization Methods
Atomic Emission Spectroscopy: Overview
Atomic Absorption Spectroscopy: Overview
When irradiated by EMR of a particular wavelength, these...
Atomic Emission Spectroscopy: Lab
Atomic Emission Spectroscopy: Instrumentation

