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pH standard-Potassium hydrogen
Code
含量或浓度 pH(25℃)
Value
Certified Uncertainty
GBW13103
4.003
0.005
GBW(E)130070
4.00
0.01
GBW(E)130153
4.01
0.01
GBW(E)130194
4.01
0.01
GBW(E)130248
4.00
0.01
GBW(E)130340
4.003
0.010
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