Ichemco Test Method

pH

Id:	8
Measure unit:	pH
Procedure:	From the set of standard buffer solutions, take the one closest to the expected pH value of the test sample, bring it to the standard temperature (20-25°C), and set the pH meter to the exact pH value. Wash the glass electrode in the deionized water and dry it with filter paper. Place the electrode in the sample and measure the pH value. Remove the electrode, wash it carefully with deionized water and place it into the preserver solution.
Remarks:
Instruments:	Glass electrode pH meter. Set of standard buffer solutions of known pH. Thermometer, graduated to 0,1°C. Glass beakers.
Recordings:	The pH test result shall be reported together with sample identifying data.
External references:	CEN EN WG1/56, ASTM E70

Rev. 2 - 22/12/2000