The Effect of Urine Matrix on Absorption Signal of Trace Elements in Flame Atomic Absorption Spectrometry
DOI:
https://doi.org/10.26629/gke98419الكلمات المفتاحية:
atomic absorption spectrometry، interferences، sensitivity، trace element analysisالملخص
Analysis of trace elements in highly interfering matrices such as urine usually accompanied with erroneous readings because of high concentration of some salts in this matrix. The optimization of the instrumental parameters of flame atomic absorption including effect of burner height, flame stoichiometry of fuel to oxidant were studied. To examine the effect of matrix concentration on the absorption signal and the reality of the absorbance values given by the instrument in presence of highly interfering matrix such as urine on of cadmium, chromium, and nickel were investigated, hence the sensitivity and reproducibility of the instrument readings and then sensitivity and reproducibility of the analysis were tested. Improvements of analysis in presence of highly interfering matrices using ethanol, citric acid and EDTA as a releasing agents were investigated.
