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Standard extraction procedure for examining chromophoric substances of turmeric was investigated. Acetone and methanol were
used as extracting solvents with different extraction procedures and pH levels. GC-MS analysis identified curcumene2 (6.7 min), feruloylmethane3 (8.3 min), coumaran4 (6.09 min), vanillin5 (6.2 min), and zingiberene6 (10.5 min) as the major products. Curcumin1 which has been known as the major chromophoric substance of turmeric was not detected in any samples. The maximum amount
of curcumene2, which was used as the fingerprint product for turmeric dye, was obtained by utilizing presoaking and decanting step with
methanol prior to actual extraction step using a waterbath shaker (WMM). The highest relative abundance of curcumene2 was detected in pH 6 sample followed by pH 5 indicating that the most appropriate pH level was in the range of pH 6–5.
This research was funded by the 2004 Research Fund of University of Incheon. 相似文献
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Curcumin dye in methanol solution was treated in 100°C oven (OV) and H2O2/UV/O2 (PER) conditions and the degradation products were examined using gas chromatography mass spectrometry (GC-MS). Curcumin
itself was not detected from either the OV or PER degraded samples. From OV degradation samples curcumene1, o-coumaric acid2, vanillin3, 2,4-di-tert-butylphenol4, benzene, 1-(3-cyclopentylpropyl)-2,4-dimethyl-45, 1-(4-hydroxy-benzylidene) acetone6, feruloylmethane7, and 2-propenoic acid, 3-[4-(acetyloxy)-3-methoxy phenyl]-, methyl ester8 were detected. From PER degraded samples new products benzoic acid9 and vanillic acid10 were detected additionally. Under the same GC-MS instrumental condition, it is possible that the burial degraded curcumin
dye or curcumin dyed textile will exhibit area peaks around 6.2∼6.5 min and 8.3∼8.4 min retention times, which have the mass
spectrum matching closely with products3, 4, 7, 8 or9, 10. 相似文献
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