Abstract
Bromine-containing flame retardants on woven and knit polyester, polyester/cotton, and cotton fabrics can be deter mined in less than ten minutes by nondispersive x-ray fluorescence. The sample is prepared by cutting a disc from the fabric with a die. The disc is weighed and then counted with commercial x-ray instrumentation employing an Am-241 irradiation source, a prolortional counter, and a single channel analyzer. After the average count is corrected for the background count obtained with untreated fabric of the same type, the milligrams of bromine are read from a calibration curve and the percent bromine is calculated. A modificaticm of the procedure alluwed nondestructive analyses of fabrics which were then used for burning rate studies. Phosphorus and chlorine do not interfere.
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