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A prerequisite for an accurate pH calibration is the availability of suitable buffer solutions. Hamilton 5.00 DuraCal liquid buffer solution (Ref 238275) has an accuracy of +/- 0.02 pH units and a stability of 60 months. The pH value of the buffer is affected by changing temperature. The effects of temperature from 5 to 50°C is shown below in 1 degree increments.

pH vs. Temperature: Reference table for 5.00 DuraCal pH buffer

Temp [°C]pH ValueTemp [°C]pH Value
5 5.04 30 5.00
6 5.03 31 5.00
7 5.03 32 5.00
8 5.03 33 5.00
9 5.03 34 5.00
10 5.02 35 5.00
11 5.02 36 5.00
12 5.02 37 5.00
13 5.02 38 5.00
14 5.01 39 5.00
15 5.01 40 5.00
16 5.01 41 5.00
17 5.01 42 5.01
18 5.01 43 5.01
19 5.01 44 5.01
20 5.01 45 5.01
21 5.00 46 5.01
22 5.00 47 5.01
23 5.00 48 5.02
24 5.00 49 5.02
25 5.00 50 5.02
26 5.00
27 5.00
28 5.00
29 5.00