Etalon-induced baseline drift and correction in atom flux sensors based on atomic absorption spectroscopy

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...

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...

Curve Correction in Atomic Absorption

Some of the causes of this curvature are controlled by the instrument design or by the experimental conditions used. The degree of curvature for nickel at the 232.0 nm wavelength, for instance, is controlled by the spectral bandwidth chosen on the monochromator, because the curvature arises from overlap of a nearby nonabsorbed line in the nickel spectrum. At practical instrument settings, it is...

Atomic absorption spectroscopy

The effect of self-absorption correction using internal reference on determining heavy metals concentration by laser induced breakdown spectroscopy

The identification and concentration of heavy metals, which may be so harmful for the body, is determined by the method of calibration-free laser-induced breakdown spectroscopy using a special strategy. First, the plasma temperature is obtained using the Boltzmann plot. Then, a line with an inappreciable self-absorption is considered for each element as the reference. The modified intensities o...