CAN PH BUFFER SOLUTION, USED TO CALIBRATE A PH METER, BE THROWN BACK INTO ORIGINAL BOTTLE WITH FRESH STOCK ?

CAN PH BUFFER SOLUTION, USED TO CALIBRATE A PH METER, BE THROWN BACK INTO ORIGINAL BOTTLE WITH FRESH STOCK ?

Can the pH buffer solution which was used to calibrate a pH meter, be thrown back into the original bottle with fresh stock?

No you should never pour used buffer solutions back into the original bottle with fresh stock - always discard used buffer solutions after calibration as it is considered to be contaminated, and reusing it can affect the accuracy of your pH measurements.

Key points to remember:
Contamination risk - once used the buffer solution may be contaminated with substances from your sample, altering its pH value.
Proper procedure - when calibrating, always pour a small amount of buffer into a separate container and discard it after use.
Fresh buffer for each calibration - for best results, use fresh buffer solutions for each calibration.

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