Study of Phyllagathis praetermissa from two geographical origins using Fourier transform infrared spectroscopy and two dimensional corelation infrared spectroscopy

Chuah C. H., . and Tan H. P., . and Ling S. K., . (2009) Study of Phyllagathis praetermissa from two geographical origins using Fourier transform infrared spectroscopy and two dimensional corelation infrared spectroscopy. [Proceedings Paper]

Phyllagathis praetermissa originated from Pasoh Forest Reserve PFR Negeri Sembilan and Ampang Forest Reserve AFR Selangor in Peninsular Malaysia can be distinguished by using macroscopic infra-red IR fingerprinting method. This method comprises the Fourier transform infrared spectroscopy FT-IR second derivative infrared spectroscopy and two-dimensional correlation infrared spectroscopy 2D-IR under thermal perturbation. Comparison of the conventional IR spectra as the first step of identification showed that the primary difference in samples from the two locations was the intensity of the characteristic peaks at 1621 cm-1 and 1694 cm1. There was also a distinctive peak at 1370 cm1 in samples collected from AFR which was not found in samples from PFR. The comparison of the second derivative IR spectra as the second step of identification also showed some differences in the range of 450-1800 cm1. Further the comparison of 2D-IR correlation spectra based on the positions and intensities of auto-peaks as the third step of identification revealed the presence of an auto-peak at 480 cml for samples from PFR but not in samples from AFR. On the other hand an auto-peak at 1510 cml found in samples from AFR was insignificant in samples from PFR. The visual and colourful 2D-IR spectra can further provide dynamic structural information of chemical components in the samples. Consequently the multisteps IR spectroscopy can be an effective fast and non-destructive method to discriminate P. praetermissa from different geographical origins.

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Abstract

Phyllagathis praetermissa originated from Pasoh Forest Reserve PFR Negeri Sembilan and Ampang Forest Reserve AFR Selangor in Peninsular Malaysia can be distinguished by using macroscopic infra-red IR fingerprinting method. This method comprises the Fourier transform infrared spectroscopy FT-IR second derivative infrared spectroscopy and two-dimensional correlation infrared spectroscopy 2D-IR under thermal perturbation. Comparison of the conventional IR spectra as the first step of identification showed that the primary difference in samples from the two locations was the intensity of the characteristic peaks at 1621 cm-1 and 1694 cm1. There was also a distinctive peak at 1370 cm1 in samples collected from AFR which was not found in samples from PFR. The comparison of the second derivative IR spectra as the second step of identification also showed some differences in the range of 450-1800 cm1. Further the comparison of 2D-IR correlation spectra based on the positions and intensities of auto-peaks as the third step of identification revealed the presence of an auto-peak at 480 cml for samples from PFR but not in samples from AFR. On the other hand an auto-peak at 1510 cml found in samples from AFR was insignificant in samples from PFR. The visual and colourful 2D-IR spectra can further provide dynamic structural information of chemical components in the samples. Consequently the multisteps IR spectroscopy can be an effective fast and non-destructive method to discriminate P. praetermissa from different geographical origins.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. mal QK99 M3S471 2008 Call Number
AGROVOC Term:	SPECTROMETRY
AGROVOC Term:	INFRARED SPECTROPHOTOMETRY
AGROVOC Term:	STATISTICAL METHODS
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:14
URI:	http://webagris.upm.edu.my/id/eprint/11352

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