HU Wei-jun. Research on signal processing of absorption spectrum of Cd(Ⅱ) sensor based on plastic optical fiber[J]. 2015, 34(9): 11-12+16. DOI: 10.13873/J.1000-9787(2015)09-0011-02.
absorption spectrum of reactive solution between Cd(Ⅱ) and1—( 4—nitrophenyl) —3—[4—( phenylazo) phenyl]—1—triazen is acquired and processed using plastic optical fiber. The research includes structure of measurement
experimental process
low-pass filtering process of spectrum signal
and non-linear fitting of spectrum peak values corresponding to four concentrations of Cd(Ⅱ). In this way
the measurement concentration of Cd(Ⅱ) can be limited down to 0. 0047 μg / ml.
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