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).