Accuracy in furnace atomic-absorption spectroscopy

Improving Accuracy in Graphite Furnace Atomic Absorption Spectrometry Through Peak Shape Monitoring

Due to the good detection limits of graphite furnace atomic absorption spectrometry (GFAAS), situations frequently arise when an analyte is determined in the presence of a large excess of concomitants. It is in these cases when the improvements made in furnace design, heating rate optimization, Zeeman background correction, platform atomization and application of matrix modifiers are still not ...

Indirect Determination of Ascorbic Acid by Atomic Absorption Spectroscopy

A new and simple method followed by atomic absorption spectrometry has been developedfor indirect determination of ascorbic acid (AA). The proposed method was based on the oxidationof AA to dehydroascorbic acid with Cu2+cation(200mgL-1)in an ammonium thiocyanatesolution atpH2.4. AA reduces Cu2+to Cu+followed by the precipitation of Cu+ with SCN-. Then, the excess ofCu2+in the solution was measu...

Determination of cadmium in urine by graphite-furnace atomic absorption spectroscopy.

A simple procedure for graphite-furnace atomic absorption analysis of cadmium in urine, based on the use of a temperature-controlled heating unit, is described. The temperature of the carbon rod is measured by resistance and controlled by electronic feedback. We studied the influence of various heating times and temperatures of ashing and atomization, as well as suitable diluents. Urine samples...

Forensics Atomic Absorption Spectroscopy

Atomic absorption spectroscopy Atomic absorption spectroscopy (AAS) was developed in the early 1950’s by Alan Walsh. It works on the principle that certain elements absorb certain wavelengths, and this level of absorption is characteristic of each element. Also, electrons in atoms can only exist in particular energy levels, and when an electron moves to a higher energy level, electromagnetic ra...

Atomic absorption spectroscopy