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Fluorimetric determination of boron with chromotropic acid by flow-injection analysis

✍ Scribed by S. Motomizu; M. Oshima; Z. Jun

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
416 KB
Volume
251
Category
Article
ISSN
0003-2670

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✦ Synopsis

Boron as boric acid was determined with chromotropic acid using a fluorescence detection-flow injection system. The flow system consisted of three streams, a carrier, a reagent and an alkaline solution. By mixing 0.5 M sodium hydroxide solution as the alkaline solution, the high background fluorescence of the reagent was diminished and the sensitivity was enhanced. The determinable concentration of boric acid was in the range 1 x 10-'-l x 10m4 M. The detection limit was 5 X 10e9 M of boron, corresponding to a signal-to-noise ratio of 3. The sample throughput was 60 hh '. The method was applied to the determination of boron as boric acid in water samples.

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