A review on applications of wavelet transform techniques in chemical analysis: 1989–1997

Starting from 1989, a new mathematical technique known as wavelet transform (WT) has been applied successfully for signal processing in chemistry. The number of publications related to the application of WT to manipulate chemical data has increased rapidly in the last 2 years from one paper being published in 1989 to 18 papers in 1996 and 41 papers in 1997. More than 70 papers were published within the period from 1989 to 1997. In these published works, WT was mainly employed for noise removal and data compression in different fields of analytical chemistry that include flow injection analysis, high performance liquid chromatography, infrared spectrometry, mass spectrometry, nuclear magnetic resonance spectrometry, ultraviolet–visible spectrometry and voltammetry. It has been employed to solve certain problems in quantum chemistry and chemical physics. In this paper, applications of the wavelet transform and its derivative wavelet packet transform (WPT) are reviewed. Research works on WT by Chinese researchers in China are also included.