Improved determination of aluminum in serum by electrothermal atomic absorption spectrophotometry.

Electrothermal atomic absorption spectrometric determination of aluminum: elimination of serum matrix effects.

An improved electrothermal atomic absorption spectrometric method for determination of aluminum in serum is described. An ammonium hydroxide/sulfuric acid diluent is used to control matrix effects from serum constituents. Because serum produces no apparent matrix effects with this diluent, one can accurately calibrate the procedure with aqueous standards.

Determination of nickel in biological samples prepared by microwave dissolution using electrothermal atomic absorption spectrometry after extraction with l,Sbis[phenyl-( 2-pyridyl) methylene] thiocarbonhydrazide

An electrothermal atomization atomic absorption spectrometric method for the determination of traces of nickel atIer extraction of the metal into methyl isobutyl ketone containing 1,5-bis[phenyl(2-pyridylhnethylene] thiocarbonhydrazide is suggested. The chief advantage of the method lies in its maximum allowable aqueous-to-organic phase volume ratio of 37. The method was applied to the determin...

Determination of Cadmium by Electrothermal Atomic Absorption Spectrometry after its Separation and Preconcentration by Syringe to Syringe Dispersive Liquid Phase Microextraction-Solidified Floating Organic Drop

The application of syringe to syringe dispersive liquid phase microextraction-solidified floating organic drop was extended for the separation and preconcentration of trace amounts of cadmium ions from water and cereal samples. The extracted cadmium was quantified by electrothermal atomic absorption spectrometry. Factors affecting the complex formation as well as microextraction efficiency such...

Improved determination of vanadium in biological fluids by electrothermal atomic absorption spectrometry.

We made sensitive and accurate electrothermal atomic absorption spectrometric measurements of vanadium in small volumes of serum. The wet-digested sample was extracted into an organic solvent, with N-benzoyl-N-(o-tolyl)hydroxylamine (BTA) as the chelating reagent. After evaporating the solvent, we dissolved the residue in acetic acid, and injected a 60-microL aliquot into a graphite furnace. In...

IUPAC reference method for analysis of nickel in serum and urine by electrothermal atomic absorption spectrometry.