GroLine pH 4.01 Calibration Buffer (230 mL) hiking water filter 01 pH removing the inaccuracies

01 pH removing the inaccuracies involved with mixing calibration solutions from powder

highly recommended)

rugged design

wall-mounted package

and ideal for challenging samples like beer

GroLine pH 4.01 Calibration Buffer (230 mL) hiking water filter 01 pH removing the inaccuraciesHI7004 023 is a high quality pH 4. 01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hanna's line of technical calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened