Limits of accuracy obtainable in the direct determination by fluorimetry of fluorescent whitening agents in solution.
In direct determination by fluorimetry the limits of detection are governed by the restricted light stability of fluorescent whitening agents (FWAs) in solution. The initial value of a fluorimetric reading can be registered by a rapid recorder, and in this way very light sensitive traces of FWAs as low as 10 parts per thousand million can be measured be measured with a statistical standard deviation of +/-15% for a single measurement and a reproducibility of +/-50% with a statistical certainty of 99%.
D001583:Benzoxazoles / Q000032:analysis; D004396:Coloring Agents / Q000032:analysis*; D003374:Coumarins / Q000032:analysis; D005470:Fluorometry / Q000295:instrumentation; D007536:Isomerism; D009281:Naphthalenes / Q000032:analysis; D055585:Physical Phenomena; D010825:Physics; D011720:Pyrazoles / Q000032:analysis; D012996:Solutions / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet; D013267:Stilbenes / Q000032:analysis
D001583:Benzoxazoles; D004396:Coloring Agents; D003374:Coumarins; D009281:Naphthalenes; D011720:Pyrazoles; D012996:Solutions; D013267:Stilbenes