METHOD 9040B pH ELECTROMETRIC MEASUREMENT

CD-ROM9040B - 1 Revision 2 January 1995 METHOD 9040 BpH ELECTROMETRIC SCOPE AND 9040 is used to measure the pH of aqueous wastes and thosemultiphase wastes where the aqueous phase constitutes at least 20% of the totalvolume of the corrosivity of concentrated acids and bases, or of concentratedacids and bases mixed with inert substances, cannot be measured. The pHmeasurement requires some water pH of the sample is determined electrometrically using eithera glass electrode in combination with a reference potential or a combinationelectrode. The measuring device is calibrated using a series of standardsolutions of known glass electrode, in general, is not subject to solutioninterferences from color, turbidity, colloidal matter, oxidants, reductants, ormoderate (< molar solution) error at pH lev

CD-ROM 9040B - 3 Revision 2 January 1995 for acidic wastes and a pH 12 buffer for caustic wastes; also, for corrosivity characterization, the sample must be measured at 25±1 EC if the

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  Methods, Measurement, Electrometric, 9040b, Method 9040b ph electrometric measurement

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