Abstract
Lithium, sodium, magnesium and calcium are routinely monitored in environmental samples and in analysis of ultrapure water for semiconductor and power generation facilities. The use of graphite furnace, atomic absorption and ICP have long been recognized as the analytical instruments of science for the detection and quantization of these cations. These spectral detectors detection method of choice of because of their inherent speed, sensitivity, and lack of interferences. This paper will present results of a recent advance using ion chromatography with chemical suppression and conductivity detection for group I and group II cations. The method allows the separation and detection of lithium, sodium, ammonium, potassium, magnesium, calcium and morpholine at the sub-μg/l levels in ultrapure water and common power plant waters.
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