Characterization of two modified carbon rod atomizers for atomic absorption spectrometry

A number of novel carbon rod atomizer configurations were constructed and tested with the goal of increasing the effective gas-phase temperatures experienced by volatile analyte metals. Both a ''top-clamped'' cup and a ''tube-cup'' atomizer permitted increases in the gas phase atomization temperature for lead and cadmium of more than a thousand degrees over those achievable with the two conventional CRA atomizer configurations. Additionally, from 2 to 3 orders of magnitude more concomitant transition metal chloride salt can be accommodated with the improved atomizer designs before matrix effects are observed.

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