Chemistry: analytical and immunological testing – Determination of water – By use of a karl fischer reagent
Reexamination Certificate
2004-07-14
2008-08-26
Wallenhorst, Maureen M (Department: 1797)
Chemistry: analytical and immunological testing
Determination of water
By use of a karl fischer reagent
C436S039000, C436S174000
Reexamination Certificate
active
07416894
ABSTRACT:
The invention relates to water standards that are producible by grounding and mixing at least one component abounding in water and one water-free or low water component each. The inventive water standards are characterized by a good storage stability. They are suitable for the calibration or the inspection of devices to determine the water content after thermal release, especially for determining the water content according to Karl Fischer in combination with a Karl Fischer oven (Karl-Fischer oven technique).
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Neuss J D et al: “Sodium Tartrate Dihydrate as a Primary Standard for Karl Fischer Reagent” Analytical Chemistry, American Chemical Society. Columbus, US Bd. 23, 1951, 1332-1333, XP001042005.
Bauer Stefanie
Gruenke Silke
Merck Patent GmbH
Millen White Zelano & Branigan P.C.
Wallenhorst Maureen M
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