Description
HANNA buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards.
All pH 4 solutions show batch number, expiration date and the correlation table between pH and temperature. HI 5004, HI 6004, HI 7004L/C, HI 8004L/C and HI 70004C are supplied complete with certificate of analysis.
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