ASTM D6569 Standard Test Method for On-Line Measurement of pH
ASTM D6569 test method covers the non-stop dedication of pH of water through electrometric dimension, the use of the glass, the antimony, or the ion-selective field-impact transistor (ISFET) electrode as the sensor. The values expressed in SI are considered as standard.
Scope:
The ASTM D6569 test method is important in water purification, treatment of waste material, and its use before it is released into the environment. The quality control, research, and performance evaluation are done with the aid of this method.
Procedure:
In ASTM D6569, pH is measured as a voltage among measuring electrode and reference electrode elements. The sensor meeting normally consists of a temperature compensator to make amends for the various output of the measuring electrode because of temperature. The sensor alerts are processed with a business pH analyzer/transmitter. The system is calibrated with well-known pH buffer answers encompassing or in near proximity to the predicted pH size range.
In ASTM D6569, a glass pH electrode measuring circuit needs to have at least a 105 Megohm enter impedance to maintain the signal.
Data:
pH error can be calculated by using the following formula:
Glass electrode pH error = (pH ̶ 7) ×(T ̶ Tf)/ Tf + 273
T = process temperature
Tf = temperature of fixed compensation
Conclusion:
The ASTM D6569 test method is important in water purification, treatment of waste material and its use before it is released into the environment. The quality control, research and performance evaluation are done by the aid of this method.
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