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A prerequisite for an accurate pH calibration is the availability of suitable buffer solutions. Hamilton 1.09 DuraCal liquid buffer solution (Ref 238271) 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 1.09 DuraCal pH buffer

Temp [°C]pH ValueTemp [°C]pH Value
5 1.09 30 1.10
6 1.09 31 1.10
7 1.09 32 1.10
8 1.09 33 1.10
9 1.09 34 1.10
10 1.09 35 1.10
11 1.09 36 1.10
12 1.09 37 1.10
13 1.09 38 1.10
14 1.09 39 1.10
15 1.09 40 1.10
16 1.09 41 1.10
17 1.09 42 1.10
18 1.09 43 1.10
19 1.09 44 1.10
20 1.09 45 1.10
21 1.09 46 1.10
22 1.09 47 1.11
23 1.09 48 1.11
24 1.09 49 1.11
25 1.09 50 1.11
26 1.09
27 1.09
28 1.09
29 1.09