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.
Direct Determination of Iron in Silicon Carbide and Silicon Nitride by Electrothermal Atomic Absorption Spectrometry with Slurry-Introduction.