| NACRES | NA.25 |
|---|---|
| UNSPSC Code | 12161704 |
| grade | certified reference material |
| product line | Certipur® |
| pH | 4.0 (20 °C in H2O) |
| density | 1.01 g/cm3 at 20 °C |
| application(s) | environmentalfood and beveragesgeneral analyticalindustrial qcpharmaceutical |
| format | mixture |
| storage temp. | 15-25°C |
| Quality Level | 300 |
Answer:Its assigned pH is 4.00 at 20 °C; use the corresponding temperature data for accurate calibration.
Answer:This ordering item is supplied as a 1 L ready-to-use solution in a plastic bottle.
Answer:The solution is used to calibrate and verify pH meters and electrodes under a documented quality-control procedure.
Merck Certipur pH 4.00 Buffer Solution provides a ready-to-use reference liquid for calibrating and checking laboratory pH measuring systems. The specified pH is 4.00 at 20 °C, and the formulation is based on citric acid with appropriate pH-adjusting components. Traceability to NIST and PTB reference materials supports documented calibration procedures when combined with the correct instrument settings and laboratory records. The 1 L plastic bottle is intended for routine use in analytical, quality-control and water-testing laboratories. Apply a temperature compensation procedure that is appropriate for the buffer and electrode, since the indicated pH depends on temperature. Pour a small working portion into a clean vessel rather than repeatedly immersing used electrodes in the original bottle. Avoid contamination with rinse water, salts or sample residues, and replace working aliquots when exposed for extended periods. Rinse the electrode between standards and check both slope and offset during multi-point calibration. This is a pH reference buffer, not a general-purpose sample extraction buffer.
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For orders below USD 1,000, an additional handling fee may apply, or we may arrange local delivery / local handover where available.
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