Hardness measurement reagent

Details Hardness measurement reagent Hardness measurement reagent

2007-04-10

2007-04-10

Wallenhorst, Maureen M. (Department: 1743)

Chemistry: analytical and immunological testing

Metal or metal containing

C436S008000, C436S018000, C436S111000, C436S131000, C436S132000, C436S079000, C436S166000, C252S408100

Reexamination Certificate

active

11091552

ABSTRACT:
To provide a hardness measurement reagent unaffected by an M alkalinity in hardness measurement. A hardness measurement reagent as a one-solution type reagent includes a dye chosen from Eriochrome Black T (EBT) and Calmagite, triethanolamine, a glycol compound, and a pH buffer, in which the pH buffer includes a combination of amines selected from primary amines and secondary amines and a salt of a weak base.

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