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GAS FACTS published periodically for analytical chemists
sion line derived from a third order polynomial equation by least squares. Quarter-to-quarter con sistency has improved markedly, while CV decreased steadily over the 12 years. These accomplishments Youden' and others have recog were catalyzed by legislative nized that round robin testing mandate, improved pub can improve analytical accuracy. lished analytical procedures, The historical improvements increasing availability of described here should be of NBS Standard Reference interest to those seeking Materials and improved improvement themselves. instrumentation.
