Bulletin of the United States Geological SurveyThe Survey, 1956 - Geology |
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Common terms and phrases
absorbance using table acid Add 10 ml aliquot alizarin red-S ammonium molybdate apparatus atomizer beaker blank correction boil Brannock buffer solution Bureau of Standards burner calcium carbonate tube circuit comparison standard concentration of K₂O cool crucible Dissolve distilled water electromagnetic hosecock Eriochrome Black Fe as Fe2O3 flame photometer H₂O Hydroxylamine internal standard dial liter Magnetic stirrer methods minutes ml of 1+1 ml of sample ml of water molybdenum blue murexide Na2O NaOH National Bureau percent Al2O3 percent TiO2 percent transmission photocell pipet plastic bottle Preparation of sample Prepare 500 ml PROCEDURE Pyrex Rapid NBS NBS Rapid Rapid NBS reagent blank solution reference blank solution Repeat step sample containing sample powder sample solution side arm SiO2 sodium potassium tartrate Sodium tungstate solution containing solution prepared spectrophotometer Standards standard sample stock solution stopper titration Total Fe total iron transmission to absorbance Versene solution volumetric flask