To use atomic absorption spectrometry and a standard addition calibration to determine the concentration of lead and zinc in a solid bronze sample.
INTRODUCTION:
Atomic Absorption Spectroscopy is generally performed with external standardisation using a calibration curve of known concentration standards and using the equation of the linear trendline to determine the concentration of the unknown by rearranging the linear equation. However, the efficienchy of this method is reduced and can be afflicted with errors by the presence of other components in the experimental sample. These matrix interferences are overcome using the standard-addition method by measuring and varying a single physical parameter of the mixed analyte, establishing a relationship between additioin of the unknown with the change in physical parameter that allows an in-situ method of calibration.
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