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Aerosol Ionic Redistribution: The Calcium-Phosphorus Solute Vaporization Effect Revisited

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It has been shown that the addition of excess phosphate to calcium solutions causes redistribution of the calcium into smaller aerosol size ranges and significant reductions in the median calcium aerosol diameters. Addition of lanthanum as a releasing agent causes the median diameter for Ca aerosol to return to the value observed in the absence of phosphate and a concomitant reduction in the median diameter of the phosphate aerosol. Such redistribution effects cause changes in the phosphate-calcium concentration ratios and the stoichiometries of the calcium-phosphorus entities that can be formed. Thus, the effect of phosphate on calcium absorbance may be an enhancement for smaller aerosol diameters and a suppression for larger diameters.

Keywords: Atomic absorption spectroscopy; Emission spectroscopy; Flame spectroscopy; Interference effects

Document Type: Research Article


Affiliations: 1: Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523; present address: Angus Chemical, 2910 MacArthur Blvd., North Brook, Illinois 60062 2: Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523

Publication date: November 1, 1986

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