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    Description

    To evade endangered timber species laws, unscrupulous importers sometimes attempt to pass protected Dalbergia nigra as look-alike but unprotected, Dalbergia Spruceana. Wood density and fluorescence properties are sometimes used to identify the species. Although these properties are useful and do not require special equipment, they may be less reliable than direct analysis in real time—time of flight mass spectrometry (DART—TOFMS). DART—TOFMS was used to check identities of the D. nigra and D. Spruceana contained in the wood collection of the Forest Products Laboratory (Madison, Wisconsin). Based on DART—TOMFS, voucher-backed heartwood samples of the two species are all correctly named, but some of the unvouchered samples are not.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Wiemann, Michael C.; Espinoza, Edgard O. 2017. Species verification of Dalbergia nigra and Dalbergia spruceana samples in the wood collection of the Forest Products Laboratory. Research Paper FPL–RP–690. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 10 p.

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    Keywords

    Dalbergia nigra, Dalbergia spruceana, Caviunin, CITES, Dalnigrin, DART-TOFMS, Density, Mass spectrometry, Principal component analysis, Wood anatomy, Wood identification

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https://www.fs.usda.gov/treesearch/pubs/53935