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Standard ph buffers, 3 standard ph buffers – Thermo Fisher Scientific CyberScan pH 10/pH 100 User Manual

Page 59

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14.3

Standard pH Buffers

The following table shows the various pH values at different temperature of the solution during

calibration.

Temperature

(ºC)

pH 1.68

(oxalate)

pH 4.01

(phthalate)

pH 7.00

(neutral

Phosphate)

pH 10.01

(carbonate)

pH 12.45

(Saturated

Calcium

Hydroxide

Solution)

0

1.67

4.01

7.12

10.32

13.43

5

1.67

4.01

7.09

10.25

13.21

10

1.67

4.00

7.06

10.18

13.00

15

1.67

4.00

7.04

10.12

12.81

20

1.68

4.00

7.02

10.06

12.63

25

1.68

4.01

7.00

10.01

12.45

30

1.69

4.01

6.99

9.97

12.29

35

1.69

4.02

6.98

9.93

12.13

40

1.70

4.03

6.97

9.89

11.99

45

1.70

4.04

6.97

9.86

11.84

50

1.71

4.06

6.97

9.83

11.70

55

-

4.08

6.97

9.81

-

60

-

4.10

6.98

9.79

-

70

-

4.12

6.99

9.76

-

80

-

4.16

7.00

9.74

-

90

-

4.20

7.02

9.73

-