pH 4.01 buffer solution (20 mL)
GEL9.00
Solution to calibrate electronic pH-meters (calibration value pH 4.01)
pH ± 0.01 @ 25 °C/77 °F
Single dose packet of 20 mL ready for use. To calibrate pocket-size pH-meters, with or without probe, directly insert the probe into the packet, making sure that the probe is covered at least 4 cm into the liquid. The content of the packet is very practical, because the solution is always "fresh" and protected from light, to the advantage of a very accurate calibration.
Measuring table based on temperature:
- 0 °C/32 °F: pH 4,01
- 5 °C/41 °F: pH 4,00
- 10 °C/50 °F: pH 4,00
- 15 °C/59 °F: pH 4,00
- 20 °C/68 °F: pH 4,00
- 25 °C/77 °F: pH 4,01
- 30 °C/86 °F: pH 4,02
- 35 °C/95 °F: pH 4,03
- 40 °C/104 °F: pH 4,04
- 45 °C/113 °F: pH 4,05
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