NBS Special Publication, العدد 422

7th IMR Symposium accuracy and precision Accuracy in Trace Anal analytical methods ashing atomic absorption biological biotite blank blood lead bottles calcium certified Chem chemical Chemistry chromium clean laboratory clinical collection compounds concentration container detection detector determination dilution distilled effect electron emission environmental evaluation evaporation factors Figure filter Gaithersburg Held October 7-11 high-purity HNO3 isotope Issued August 1976 mass spectrometry measurement ment mercury mineral neutron activation analysis ng/g obtained oxidation parameters particulate percent perchloric acid pollution polyethylene potassium precision problems procedures quantitative quartz reagents relative relative standard deviation reported Sample Handling sampler serum uric acid sodium solution specimen spectrometry SRM's standard deviation Standard Reference Materials storage sulfate sulfuric acid systematic error TABLE techniques Teflon temperature tion Trace Analysis trace element trace metals uric acid values water quality x-ray zinc µg/g