UC Davis Quarterly QA/QC Reports

These reports summarize the quality assurance performed during and after elemental analysis of three months of IMPROVE samples . The elemental analyses include the determination of most elements with atomic numbers from 11 to 40 (Na-Zr) and 82 (Pb) with two energy dispersive X-ray fluorescence systems (XRF), and the determination of hydrogen by Proton Elastic Scattering Analysis (PESA) with the Crocker cyclotron. The following data assessments and quality controls are obtained for all analyses: Concentration calibration and verification; Energy calibration; Laboratory replicates (reanalysis); Systems comparison.