Precision estimate of fluorescence quenching based fiber optical oxygen sensor

Authors:
  • 邓辉邓辉DENGHui
    邓辉DENGHui
  • 柏云柏云BAIYun
    柏云BAIYun
  • 肖吉肖吉群XIAOJiqun
    肖吉群XIAOJiqun
  • 吴青吴青龙WUQinglong
    吴青龙WUQinglong
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Abstract
Oxygen content is simultaneously on-line measured by intensity and phase delay detection.The oxygen-sensitive membrane is prepared by sol-gel,using tris(4,7 diphenyl - 1,10 phenanthroline)ruthenium(II)dichloride as indicator.The signal tanФ0/tanФ and I0/I show good relationship(Stern-Volmer model,R2 > 0.998)with oxygen content in region of 0-5%.The theoretical lower limit reaches 50×10-6.The precision estimate is taken by comparative study of affection of measurement method and signal input mode.At lower oxygen content,phase delay detection shows better precision.