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Methods for Chemical Analysis of Water and Wastes

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Methods for Chemical Analysis of Water and Wastes ( methods-chemical-analysis-water-and-wastes )

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9 PrecIsIon and Accuracy 9 1 92 PreCISIOn and accuracy data are not avaIlable at thIS time A threshold number IS not a preCIse value In the case of the sIngle observer, It represents a Judgment at the time of testIng Panel results are more meamngful because IndIVIdual dIfferences have less Influence on the result One or two observers can develop useful data If companson wIth larger panels has been made to check theIr sensItivIty Compansons of data from tIme to time or place to place should not be attempted unless all test condItions have been carefully standardIZed and some basIs for companson of observer IntensIties eXIsts BiblIography 1 Standard Methods for the EXamInatIOn of Water and Wastewater, 14th EdItion, p 75, Method 206, (1975) 2 ASTM, Comm E-18, STP 433, "BasIc Pnnclples of Sensory EvaluatIOn", STP 434, Manual on Sensory TestIng Methods, STP 440, "CorrelatIOn ofSubJectIve-ObJective Methods In the Study ofOdors and Taste", PhIl, Pennsylvama (1968) 3 Baker, R A , "Cntlcal EvaluatIOn of Olfactory Measurement" Jour WPCF, 34, 582 (1962) 140 1-7

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