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pH standard-Sodium tetraborate
Code
硼砂PH(25˚C)
P
H
硼砂pH标准值 pH Standard values
Value
Certified Uncertainty
Value
Certified Uncertainty
GBW13106
9.18
0.005
GBW(E)130072
GBW(E)130156
9.18
0.01
GBW(E)130196
9.18
0.01
GBW(E)130250
9.18
0.01
GBW(E)130343
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