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7.2 Immerse pH electrode(s) Into sample and stir at a rate that does not cause sample surface disturbance 7.3 Titrate with 002 N NaOH (62) to pH 8 3 Titration should be made as quickly as possible to prevent absorption of atmosphenc CO2 Reoord volume of titrant 8 . Calculation 81 Acidity,peq/L::'~N x105 B peq/L ::' mlcroeqUivalents per liter mLB =mLofNaOHtitrant mLs = mL of sample NB = normality of titrant Precision and Accuracy PrecIsion and accuracy data are not available References 9. 9 1 1, 2 3 4 6 Seymour, M D . Scbubert, S A , Clayton, J Wand Fernando, Q, Variation In the ACid Content of Ram Water In the Course of a Sangle Precipitation, Water, Air and Soli Pollution 10{2) 147-161, Aug 1978 Peden, M E and Skowron, IOniC StabilitY of Precipitation Samples, Atmospheric EnVironment, Vol 12.pp 2343-2349 1978 USGS, Methods for Collection and AnalysIs of Water Samples for Dissolved Minerals and Gases, p 39, (1970) Annual Book of ASTM Standards, part 31, "Water, 'p 107, Dl067, (1978) Standard Methods for the Examination of Water and Wastewater, 14th Edition, p 273, Method 402 (1975) mLs Dec 1982 3052-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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