EPA Method 9001

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EPA Method 9001:
DETERMINATION OF WATER IN WASTE MATERIALS BY QUANTITATIVE CALCIUM HYDRIDE REACTION

Summary:
A sample of the material to be tested is treated with a specially formulated calcium hydride reagent which reacts with water in the sample to liberate hydrogen gas. The reaction is carried out in a sealed pressure vessel and the resulting pressure is then measured using a specially designed meter. The results are displayed directly in weight or volume percent, depending on the sampling method used. The reaction is quantitative, measuring all water present in the sample over the range of 0.1 to 100%.

Scope:
This quantitative calcium hydride reaction method is capable of determining water in the concentration range from 0.1% to 100% in liquid and solid materials including oils, paints, soils and water/alcohol mixtures. It is intended to be used as either a field or laboratory method.

Report Number:
SW-846 Ch 3.3