Bluelab GL56732898 PH 4.0 Calibration Solution, 500 milliliters lab-Chemical-Standards, Na

Product Description

"pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7. 0 first (buffer) then to pH 4. 0 (slope). Calibration Solution should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened. "

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