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8 9 · 7 9 To prevent preCIpItatIOn of sodlUm sahcylate m the waste tray, whlCh can clog the tray outlet, keep the mtrogen flowcell pump tube and the mtrogen Colonmeter "To Waste" tube separate from all other lmes or keep tap water flowmg m the waste tray 7 10 After a stable baselme has been obtamed start the Sampler CalculatIons 1 8 1 Prepare standard curve by plottmg peak heIghts of processed standards agamst concentratIOn values Compute concentratHms ?y companng sample peak heIghts wIth standard curve PreCISIon and Accuracy 2 3 4. 5 McDamel, W H , HemphIll, R N and Donaldson, W T , "Autqm~tlC DetermmatIOn of Total K]eldahl NItrogen m Estuanne Water", Techmcon SymposIa, pp 362-367, Vol 1, 1967 Gales, M E , and Booth, R L , "EvaluatIOn of Organic NItrogen Methods", EP A Office of Research and Momtonng, June, 1972 Gales, M E and Booth, R L , "SImultaneous and Automated DetermmatIOn of Total Phosphorus and Total KJeldahl NItrogen", Methods Development and Quahty Assurance Research Laboratory, May, 1974 Techmcon "Total Kjeldahl NItrogen and Total 'Phosphorus BD-40 DIge~tIOn Procedure for Water", August, 1974 . , Gales, M E . and Booth, R L , "EvaluatIOn of the Block DIgestIOn System for the Measurement of Total KJeldahl Nitrogen and Total Phosphorus", EPA-600/4-78-015, EnvIronmental Momtonng and Support Laborat~ry,Cmncmnatl, OhIO 9 1 9.2 In a smgle laboratory (EMSL), usmg sewage samples of concentratIOns of 1 2, 26, and 17mgNil,thepreCISIOnwas ±O07, ±O03and ±O15,respectIvely In a smgle laboratory (EMSL), usmg sewage samples of concentratIOns of 47 and 8 74 mg N il, the recovenes were 99 and 99%, respectIvely I, Bibliography . 3512-4 , ,PDF Image | Methods for Chemical Analysis of Water and Wastes
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