National eutrophication survey: data acquisition and laboratory analysis systems for lake samples, Volume 1
Environmental Protection Agency, Office of Research and Development, Environmental Monitoring and Support Laboratory, 1975 - Nature - 21 pages
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Acquisition And Laboratory Alkaline water ammonia Ammonium chloride Ammonium molybdate Ammonium persulfate Antimony potassium tartrate Ascorbic acid AUTOANALYZER Data Acquisition data cards deionized water Dissolve digestor distilled water Environmental Monitoring Environmental Protection Agency field data form Figure g Distilled glutamic acid hydrochloric acid Laboratory Analysis liter with distilled location of printout method mg/1 Methyl orange alkalinity MG/L mg/liter nitrogen ml of distilled ml of sample Monitoring and Support National Eutrophication Survey nitrite plus nitrate Office of Research persulfate phenol phosphorus potassium sodium tartrate printout point pumps recorded are reagent Recorder charts regular samples replicate and spiked Research and Development results for replicate run in duplicate Sample Control Form SECCHI Sodium hypochlorite Sodium nitroprusside spiking solution Standard Calibration station description coding STORET PARAMETER CODES STORET system subsequent runs begin Sulfuric acid Technicon Industrial Systems transcribed onto sheets twentieth sample U.S. Environmental Protection Vegas wash to establish wt/vol solution xxxxx.xx xxxxxx
Page ii - US Environmental Protection Agency, and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
Page 7 - Nl napthylethylenediamine hydrochloride to form an azo dye. The azo dye intensity which is proportional to the nitrate concentration is then measured. Separate...
Page 14 - Erlenmeyer flask, dissolve 83 g of phenol in 50 ml of distilled water. Cautiously add, while cooling under tap water, in small increments with agitation, 180 ml of 20% Na0H.
Page ii - Environmental Monitoring and Support Laboratory-Las Vegas (EMSL-LV). This Laboratory is one of three Environmental Monitoring and Support Laboratories of the 0ffice of Monitoring and Technical Support in the US Environmental Protection Agency's 0ffice of Research and Development.
Page 7 - The method for total alkalinity uses methyl orange as an indicator because its pH range is in the same range as the equivalence point for total alkalinity.