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Analysis of select Dalbergia and trade timber using direct analysis in real time and time‐of‐flight mass spectrometry for CITES enforcement
Author(s) -
Lancaster Cady,
Espinoza Edgard
Publication year - 2012
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.6215
Subject(s) - dart ion source , linear discriminant analysis , cites , chemistry , identification (biology) , mass spectrometry , quadrupole ion trap , species identification , statistical analysis , statistics , ecology , chromatography , zoology , biology , mathematics , ion , organic chemistry , electron ionization , ion trap , ionization
RATIONALE International trade of several Dalbergia wood species is regulated by The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). In order to supplement morphological identification of these species, a rapid chemical method of analysis was developed. METHODS Using Direct Analysis in Real Time (DART) ionization coupled with Time‐of‐Flight (TOF) Mass Spectrometry (MS), selected Dalbergia and common trade species were analyzed. Each of the 13 wood species was classified using principal component analysis and linear discriminant analysis (LDA). These statistical data clusters served as reliable anchors for species identification of unknowns. RESULTS Analysis of 20 or more samples from the 13 species studied in this research indicates that the DART‐TOFMS results are reproducible. Statistical analysis of the most abundant ions gave good classifications that were useful for identifying unknown wood samples. CONCLUSIONS DART‐TOFMS and LDA analysis of 13 species of selected timber samples and the statistical classification allowed for the correct assignment of unknown wood samples. This method is rapid and can be useful when anatomical identification is difficult but needed in order to support CITES enforcement. Published 2012. This article is a US Government work and is in the public domain in the USA.