The direct determination of water in minerals and rocks using dc-arc emission spectrography is described. A precision of ±8% or better is attained over a concentration range of ∼1%–20% H2O. Electrodes of a special design are used and careful control of absorbed
moisture is required.
Cabot Spectrographic Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
Publication date: May 1, 1967
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