Prima Tatum

Document Type


Date of Award



College of Science, Engineering, and Technology (COSET)

Degree Name

MS in Chemistry

First Advisor

Professor Curtis McDonald


There are several ways to determine trace amounts of lead in biological samples. The use of matrix modifiers and auxiliary modifiers along with the Graphite Furnace Atomic Absorption Spectrometric technique is one of the ways to measure the levels of lead in blood and urine. This study is directed towards the use of rhodium as a matrix modifiers for the determination of lead using Graphite Furnace Atomic Absorption (GFAAS) technique. At a constant atomization temperatures, the ashing temperature has an effect on the lead absorbance signal. The effect modifiers and an auxiliary modifier on the analysis of lead in blood using GFAAS have been investigated in this study. This research was conducted at varying ashing temperatures and at a constant atomization temperature. The results of this study produced some interesting results. The use of the rhodium and auxiliary modifier increased the absorbance signal at ashing temperatures ranging from 800°C - 1 2 lOOO°C. These high temperatures allowed for the matrix to be removed and the analyte to be measured accurately. The atomization temperature was constant at 1500°C.