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PH - Calibration

Started by , Nov 11 2011 07:58 AM
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Good morning all....

I have two questions

1 - How is the work of calibration device for pH?
2 - What is the time required between each other and calibrated according to ISO 9001 and ISO 22000?


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Thank you very much...
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Dear,
First question as i understood that how calibration has importance to pH meter. Actually calibration compensates deviations of asymmetry potential and slope of the electrode over time. calibration with buffer ( two or three point calibration) solutions corrects variations in the electrode response.
Calibration frequency may be between oh and 7 days, but mostly programmed for daily calibration (three step daily is recommendable).

Faisal
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