Matrix interferences in furnace atomic absorption spectrometry

Determination of sodium and potassium in nanoliter volumes of biological fluids by furnace atomic absorption spectrometry

“…formation and some soaking of the sample into the graphite. This may in turn result in the inteferences encountered (7,8).…”

“…Boric Acid Pretreatment. Reports by Sotera et al (7) and Krasowski and Copeland (8) suggested that boric acid pretreatment of the graphite platform could reduce interference by forming a boric carbide coating on the platform and thus prevent soaking of the sample into the graphite surface. Boric acid pretreatment of the microboat was evaluated for prevention of HC03 interference with sodium.…”

Analytical Aspects of the Determination of Chromium by Graphite Furnace A.A.S.

“…This is also the case for quartz, although the amounts of released chromium are lower than from glass. Etching of quartz, porcelain, polystyrene and teflon by fluoric acid (Figure 8) shows that chromium is homogeneously distributed in quartz, glass and porcelain : the curves show a linear correlation between etching time (and thus etching depth) and released chromium. This means that recipients made of these materials cannot be made contamination-free despite of a radical cleaning procedure.…”

A Critical Review

“…Matrix concentrations of up to 10 mg/mL caused less than 5% signal suppression for the constant temperature furnace while signal suppressions of up to 80% were observed for the other atomizers. 137 A unique multi-element atomic absorption spectrometer has been developed on the basis of a continuum source and an echelle polychromator with wavelength modulation. This instrument is capable of measuring up to 16 elements simultaneously with either flame or electrothermal atomization.…”