ASTM D5128-90(1999)e1
Historical Standard: ASTM D5128-90(1999)e1 Standard Test Method for On-Line pH Measurement of Water of Low Conductivity
SUPERSEDED (see Active link, below)
ASTM D5128
1. Scope
1.1 This test method covers the precise on-line determination of pH in water samples of conductivity lower than 100 [mu]S/cm (see Tables 1 and 2) over the pH range of 3 to 11 (see Fig. 1), under field operating conditions, utilizing a sealed, non-refillable, reference electrode. pH measurements of water of low conductivity are problematical for conventional pH electrodes, methods, and related measurement apparatus.
1.2 This test method includes the procedures and equipment required for the continuous pH measurement of low conductivity water sample streams including the requirements for the control of sample stream pressure, flow rate, and temperature.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D1293 Test Methods for pH of Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3864 Guide for Continual On-Line Monitoring Systems for Water Analysis
D4453 Practice for Handling of High Purity Water Samples
D5464 Test Method for pH Measurement of Water of Low Conductivity
Keywords
high purity; low conductivity; on-line; pH; Acidity, alkalinity, pH--water; Automated procedures--water analysis; Calibration--water analysis instrumentation; Conductance and conductivity (electrical)--water; Field testing--water; Low-conductivity water; pH--water; Water analysis;
ICS Code
ICS Number Code 71.040.50 (Physicochemical methods of analysis)
DOI: 10.1520/D5128-90R99E01
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