Temperature Influence on DuraCal pH Buffer

A prerequisite for an accurate pH calibration is the availability of suitable buffer solutions. Hamilton 10.01 DuraCal liquid buffer solutions are considered "Certified Reference Material" and are tested by a 3rd party lab - DAkkS - against primary reference solutions from PTB and NIST. 10.01 liquid buffers have an accuracy of +/- 0.02 pH over 60 months. Like all aqueous solutions, 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 10.01 DuraCal buffer

(Refs 238321, 238223, 238923, 238187, 238898)

Temp [°C]	pH Value	Temp [°C]	pH Value
5	10.19	30	9.97
6	10.18	31	9.95
7	10.17	32	9.94
8	10.17	33	9.93
9	10.16	34	9.92
10	10.15	35	9.92
11	10.14	36	9.91
12	10.13	37	9.90
13	10.13	38	9.89
14	10.12	39	9.88
15	10.11	40	9.86
16	10.10	41	9.86
17	10.09	42	9.85
18	10.08	43	9.84
19	10.07	44	9.83
20	10.06	45	9.83
21	10.05	46	9.82
22	10.04	47	9.81
23	10.03	48	9.80
24	10.02	49	9.80
25	10.01	50	9.79
26	10.00
27	9.99
28	9.98
29	9.97