CHMB16H3 Chapter Notes - Chapter 5: Dynamic Range, Blank Noise, Chromatography

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2 Apr 2014
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Chapter 5 quality assurance to the raw data statistics to treated data our purpose; the answer should have sufficient accuracy and precision. Quality assurance: procedures to follow in order to obtain the correct answer for. Raw data: individual values of a measured quantity, i. e. volumes from a burette. Treated data: concentrations or amounts found by applying a calibration procedure. Results: quantities that are reported, i. e. mean or standard deviation, after applying. Use objectives: states the purpose for which the results will be used. Specifications: sampling requirements, accuracy and precision, rate of false results, selectivity, sensitivity, acceptable blank values, recovery of fortification (spiking), calibration checks, and quality control samples. Must collect representative samples and analyte must be preserved after the sample has been collected. Accuracy: calibration checks, fortification recoveries, quality control samples, blanks. Precision: replicate samples and replicate portions of same sample. False positive: conclude that the results yes when in fact it is no.

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