کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10564638 | 970853 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fourier transform near- and mid-infrared spectroscopy can distinguish between the commercially important Pelargonium sidoides and its close taxonomic ally P. reniforme
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کلمات کلیدی
FT-MIROPLS-DAPelargonium sidoidesFT-NIRPelargonium reniformePCA - PCAFourier transform infrared - تبدیل فوریه مادون قرمزPrincipal component analysis - تحلیل مولفههای اصلی یا PCANumber of components - تعداد اجزاءFT-IR - طیف سنجی مادون قرمز تبدیل فوریهFourier transform infrared spectroscopy - طیف سنجی مادون قرمز تبدیل فوریه یا طیف سنجی FTIRprincipal component - مولفه های اصلیorthogonal projections to latent structures discriminant analysis - پیش بینی های متعامد به تجزیه و تحلیل تجزیه و تحلیل سازه های پنهانquality control - کنترل کیفیت
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Pelargonium sidoides is indigenous to South Africa and abundant in the Eastern Cape Province. Several herbal products have been formulated using P. sidoides of which Umckaloabo® is probably the most popular and successfully marketed in Germany. The objective of this study was to discriminate between P. sidoides and Pelargonium reniforme by FT-IR spectroscopy. Absorbance spectra were collected for P. sidoides (n = 96) and its close taxonomic ally P. reniforme (n = 57) in the near infrared (NIR) and mid infrared (MIR) regions. The spectroscopic data were analysed using chemometric computations including principal component analysis and orthogonal projections to latent structures discriminant analysis. Phytochemical variation of 5.79% in the NIR dataset (R2X(cum) = 0.962; Q2(cum) = 0.918) and 9.22% variation in the MIR dataset (R2X(cum) = 0.497; Q2(cum) = 0.658) was responsible for the separation of the two species. Seven absorption areas were identified as putative biomarkers responsible for the differences between the two species. These results indicate that FT-NIR and FT-MIR spectroscopy can be used to discriminate between these two closely related species which occupy a sympatric distribution in South Africa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vibrational Spectroscopy - Volume 55, Issue 2, March 2011, Pages 146-152
Journal: Vibrational Spectroscopy - Volume 55, Issue 2, March 2011, Pages 146-152
نویسندگان
J.E. Maree, A.M. Viljoen,