کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1197394 | 1492982 | 2012 | 4 صفحه PDF | دانلود رایگان |
Thirty-four samples of Red Oak (Quercus rubra) and fifty samples of White Oak (Quercus alba) were analyzed by pyrolytic direct analysis in real time (DART) ionization coupled with time-of-flight (TOF) mass spectrometry. Although significant differences were not observed in the positive-ion mass spectra, the negative-ion mass spectra showed clear differences. Principal component analysis (PCA) and linear discriminant analysis (LDA) were calculated for the relative abundances of 11 peaks in the negative-ion mass spectra including peaks tentatively assigned as representing deprotonated acetic, malic, gallic, dimethoxycinnamic, and ellagic acids. Leave one out cross validation (LOOCV) was 100% successful in classifying the samples for both PCA and LDA.
► Direct analysis in real time (DART) mass spectrometry for classifying Red and White Oak.
► Negative-ion pyrolysis DART mass spectra show significant differences.
► Principal component analysis (PCA) and linear discriminant analysis (LDA) are 100% successful in classifying wood samples.
Journal: Journal of Analytical and Applied Pyrolysis - Volume 95, May 2012, Pages 134–137