In the chapter opener, trace metals in teeth and bone provide information about Otzi the Icemans diet
Question:
In the chapter opener, trace metals in teeth and bone provide information about Otzi the Iceman’s diet and environment as a child and adult. The inorganic mineral matrix of teeth and bone is hydroxyapatite, Ca10(PO4)6(OH)2. Ca10(PO4)6(OH)2. Matrix-matched materials are needed to calibrate the laser ablation measurements in the Otzi studies.
Graphite furnace atomic absorption and inductively coupled plasma-mass spectrometry were used to determine manganese content in standard reference bone.
a. Explain why Mg(NO3)2Mg(NO3)2 is added to bone samples to suppress matrix interference in MnMn analysis by graphite furnace atomic absorption.
b. Explain why La3+La3+ is added to bone samples in an alternative graphite furnace method for MnMn.
c. Explain why NH3NH3 is added in the dynamic reaction cell to suppress interference in inductively coupled plasma-mass spectrometry.
Step by Step Answer:
aMgNO32MgNO32 is added to bone samples to suppress matrix interference in MnMn analysis because it is a major value that is lower than the concentration of Mn in bone This makes it a better reference material than CaCO3 which has a high concentration of Ca which is similar to Mn in the sample matrix and would interfere with the analysis b ...View the full answer
Quantitative Chemical Analysis
ISBN: 9781319164300
10th Edition
Authors: Daniel C. Harris, Charles A. Lucy
