YANG Huinan, GUO Xiaolong, YANG Bin, et al. Simultaneous measurement of film thickness and concentration of urea-water solution by laser spectroscopy[J]. CIESC Journal, 2015, (2): 759-763.
YANG Huinan, GUO Xiaolong, YANG Bin, et al. Simultaneous measurement of film thickness and concentration of urea-water solution by laser spectroscopy[J]. CIESC Journal, 2015, (2): 759-763.DOI: 10.11949/j.issn.0438-1157.20141006.
Measurement of film thickness and concentration of urea-water solution is very important in many practical applications. However
these two important parameters can only be determined separately by conventional measurement methods. Here
a novel online measurement method by laser spectroscopy was developed to obtain the film thickness and concentration of urea-water solution simultaneously. By sensitivity analysis and cross-validation
an optimal wavelength pair (7040.75 cm-1 and 6761.00 cm-1) was chosen to determine film thickness and concentration. As shown from cross-validation
uncertainties of the developed method were smaller than 1.40% for thickness measurement and 5.76% for concentration measurement.