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Aquastar® Water Standard Oven 1%

This standard is an entirely solid standard for the Karl Fischer oven method. In contrast to other solid standards such as lactose, citrate or tartrate, this standard has a considerably lower water content of only 1%, and can be used over a wide temperature range from 140-400°C. The composition of the solid standard is based on an inorganic substance, which is stable even at high temperatures. In contrast, with organic substances decomposition reactions with formation of water may already set in at temperatures above 150°C, leading to erroneous results. The low water content of 1% is particularly suited when using the Karl Fischer oven with a coulometer. Each package contains a batch-specific certificate with the exact measured water content of the batch, uncertainty data, measuring methods - Karl Fischer method and thermogravimetric analysis – and minimum shelf-life.


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