Studies on Analysis of Terpene Resin in Imported Chewing Gums

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  • 外国産チューインガム中のテルペン樹脂の分析
  • ガイコクサン チューインガム チュウ ノ テルペン ジュシ ノ ブンセキ

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We have developed an analytical method for terpene resins in chewing gum. The fraction including terpene resins was prepared by means of hexane extraction and two silica gel column chromatography treatments (hexane and ethyl acetate) from chewing gum. The terpene resin fraction was analyzed with LC/MS and IR. The terpene resins are mixtures of polymeric pinene and/or limonene, which have a monomer molecular weight of 136. The MS spectrum of the terpene resin peak on the LC/MS total ion chromatogram showed protonated molecular ion (M+H)+ peaks at intervals of m/z 136, characteristic of a complex mixture of polyterpenes. IR spectroscopy is a suitable technique to identify the terpene resin type, i.e., pinene or limonene. When the method was applied to imported chewing gum sold in Japan, terpene resins were clearly detected.

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