ABSTRACT
Raw data are generated by the analytical process, which includes QC checks. Reportable data or final results are generated from raw data by mathematical or statistical calculations. Final results may be produced by direct readings from the instrument or calculations based on readings or instrument output. Before starting calculations, make sure that all readings or outputs are correct and the selected formulas used in calculations are appropriate. Formulas and calculations should be recorded in the laboratory notebook or on the work sheet. In all records, calculations are entered in ink and mistakes are never erased; just cross through the error with a single line, and date and sign. Generation of raw data and all related calculations and complete record keeping are the responsibility of the analyst.
