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Table 3 pH, ORP (mV) and temperature values (continued)
Temperature
°C
°F
80
176
2.01
4.22
90
194
2.01
4.30
Buffer solutions (DIN 19266)
Refer to
Table 4
for pH values of specific buffer sets at varying
temperatures.
Table 4 pH and temperature values
Temperature
°C
°F
5
32
1.668
4.004
10
50
1.670
4.000
20
68
1.675
4.001
25
77
1.679
4.006
30
86
1.683
4.012
40
104
1.694
4.031
50
122
1.707
4.057
60
140
1.723
4.085
70
158
1.743
4.126
80
176
1.766
4.164
90
194
1.792
4.205
Conductivity standard solutions
Refer to
Table 5
for conductivity values of standard solutions at varying
temperatures.
pH
7.04
8.83
—
7.09
8.79
—
pH
6.951
7.087
9.395
10.245
6.923
7.059
9.332
10.179
6.881
7.016
9.225
10.062
6.865
7.000
9.180
10.012
6.853
6.987
9.139
9.966
6.838
6.970
9.068
9.889
6.833
6.964
9.011
9.828
6.836
6.968
8.962
—
6.845
6.982
8.921
—
6.859
7.004
8.885
—
6.877
7.034
8.850
—
Table 5 Conductivity and temperature values
mV
Temperature
°C
°F
—
15.0
59
—
16.0
60.8
17.0
62.6
18.0
64.4
19.0
66.2
20.0
68
21.0
69.8
22.0
71.6
13.207
23.0
73.4
13.003
24.0
75.2
12.627
25.0
77
12.454
26.0
78.8
12.289
27.0
80.6
11.984
28.0
82.4
11.705
29.0
84.2
11.449
30.0
86
—
31.0
87.8
—
32.0
89.6
—
33.0
91.4
34.0
93.2
35.0
95
Conductivity (EC)
µS/cm
µS/cm
mS/cm
119
1147
10.48
122
1173
10.72
125
1199
10.95
127
1225
11.19
130
1251
11.43
133
1278
11.67
136
1305
11.91
139
1332
12.15
142
1359
12.39
145
1386
12.64
147
1413
12.88
150
1440
13.13
153
1467
13.37
156
1494
13.62
159
1522
13.87
162
1549
14.12
165
1581
14.37
168
1609
14.62
171
1638
14.88
174
1667
15.13
177
1696
15.39
mS/cm
92.5
94.4
96.3
98.2
100.1
102.1
104.0
105.4
107.9
109.8
111.8
113.8
115.7
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