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Rapid Identification for the Pterocarpus Bracelet by Three-Step Infrared Spectrum Method.

Zhi Jin1, Weili Cui2, Fangda Zhang1

  • 1Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China.

Molecules (Basel, Switzerland)
|July 28, 2022
PubMed
Summary

A three-step infrared spectrum method rapidly identifies authentic Pterocarpus santalinus collections. This technique distinguishes genuine P. santalinus wood from fakes, crucial for high-value item anti-counterfeiting efforts.

Keywords:
2DIRFTIRPterocarpuswood identification

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Forensic Science

Background:

  • High-value Pterocarpus collections, particularly those from Pterocarpus santalinus, are susceptible to counterfeiting.
  • Accurate and rapid identification methods are essential for verifying the authenticity of these precious materials.
  • Traditional identification methods may be time-consuming or lack the required precision.

Purpose of the Study:

  • To develop and validate a rapid, multi-step infrared spectroscopy method for identifying Pterocarpus santalinus.
  • To differentiate commercial Pterocarpus bracelets (PB) from genuine P. santalinus.
  • To provide an effective anti-counterfeiting strategy for valuable Pterocarpus wood products.

Main Methods:

  • Utilized a three-step infrared spectrum analysis: Fourier transform infrared spectroscopy (FTIR), second derivative IR spectra (SDIR), and two-dimensional correlation infrared (2DIR) spectroscopy.
  • Compared spectral features of commercial Pterocarpus bracelets with authentic Pterocarpus santalinus samples.
  • Employed fluorescence microscopy to corroborate the spectroscopic findings for wood identification.

Main Results:

  • FTIR and SDIR analyses revealed distinct peak differences between commercial Pterocarpus bracelets and P. santalinus, particularly at specific wavenumbers.
  • 2DIR spectroscopy highlighted differential responses of holocellulose and aromatic functional groups to thermal perturbation, clearly distinguishing the two sample types.
  • Fluorescence microscopy confirmed the effectiveness and consistency of the infrared spectroscopic method for wood authentication.

Conclusions:

  • The three-step infrared spectrum method offers a rapid, effective, and reliable approach for the anti-counterfeiting of Pterocarpus collections.
  • This technique provides a robust tool for verifying the authenticity of commercial Pterocarpus wood products.
  • The study successfully demonstrated a practical application of advanced spectroscopic methods in combating the trade of counterfeit high-value natural products.