Analysis of saline matrices by high-resolution ICP-OES

Brines play an important role in many industrial processes, e.g., in the production of magnesium and chlorine by electrolysis, as agent for water-injection in oil-wells, or as starting material for the fabrication of high-purity salts and preservatives. In some regions, naturally occurring brines and sea water are also considered to be an attractive candidate for drinking water production. Yet the direct elemental analysis of saline matrices using ICP techniques in routine laboratories is challenging in respect to (a) achieving good signal stability with low signal to noise levels, (b) ionization interferences of alkali and alkaline earth metals that often lead to intensity deviations in the range from ± 5 to 10%, and (c) maintenance issues, memory effects, and short lifetime of glassware and clogging.

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