Abstract
The design of the flame photometric detector has not been changed significantly in more than two decades. Major problems in the use of this detector for quantitative analysis are variation in the response with molecular structure of a sulfur-containing species, and hydrocarbon quenching. The variable response noted with the FPD may, in part, be associated with the wavelength shift of the interference filter bandpass for off-axis radiation. We have developed a flame photometric detector which employs rare-earth glass filters that transmit a wavelength-stable band for characteristic sulfur emission. With optimized flame conditions, we find a three-fold increase in sensitivity and control of quenching reactions, and this leads to straightforward analysis of different sulfur-containing fuels.
Published Version
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