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Determination Of Traces Of Heavy Elements (Pb, Zn, Cu, Cd, Ca And Mg) In Human Teeth From Klang Valley And Malacca Using Icp-Aes And Xrf Techniques, Chea Beng Lee
Student Works (2000-2009)
X-ray Fluorescence (XRF) and Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) have been used to study the concentration of heavy metals in human teeth. XRF technique has been used to determine Pb concentration in human teeth with the excitation source ofTc-99m combined with an XR-IOOT-CZT detector. The sensitivity of this system to determine the concentration of Pb lower than 800 ppm was constrained by Tc-99m's y-ray energy of 140.5 keV. High percentage errors in the calculation of average mean of differences for each concentration (from 100 ppm to 800 ppm) were found if compared with the respective background measurements which caused …