[Near infrared spectra (NIR) analysis of octane number by wavelet denoising-derivative method].
Derivative can correct baseline effects and also increase the level of noise. Wavelet transform has been proven an efficient tool for de-noising. This paper is directed to the application of wavelet transfer and derivative in the NIR analysis of octane number (RON). The derivative parameters, as well as their effects on the noise level and analytic accuracy of RON, have been studied in detail. The results show that derivative can correct the baseline effects and increase the analytic accuracy. Noise from the derivative spectra has great detriment to the analysis of RON. De-noising of wavelet transform can increase the S/N and improve the analytical accuracy.
Tian
Gao-you
GY
Research Institute of Petroleum Processing, Beijing, China.
Yuan
Hong-fu
HF
Chu
Xiao-li
XL
Liu
Hui-ying
HY
Lu
Wan-zhen
WZ
D000465:Algorithms; D005742:Gasoline / Q000032:analysis* / Q000592:standards; D009795:Octanes / Q000032:analysis* / Q000737:chemistry; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
D005742:Gasoline; D009795:Octanes; C026728:octane