Structure Identification of Contaminants in a Beverage Product by Liquid Chromatography Coupled with Quadrupole Time-of-Flight Mass Spectrometry

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  • MIYAMOTO Yasuhisa
    Research Laboratories for Food Safety Chemistry, Asahi Group Holdings, Ltd.
  • WASHIDA Kazuto
    Research Laboratories for Food Safety Chemistry, Asahi Group Holdings, Ltd.
  • UYAMA Atsuo
    Research Laboratories for Food Safety Chemistry, Asahi Group Holdings, Ltd.
  • MOCHIZUKI Naoki
    Research Laboratories for Food Safety Chemistry, Asahi Group Holdings, Ltd.

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  • 高速液体クロマトグラフ―四重極飛行時間型質量分析計を用いた飲料中混入物の同定
  • コウソク エキタイ クロマトグラフ : シジュウキョク ヒコウ ジカンガタ シツリョウ ブンセキケイ オ モチイタ インリョウ チュウ コンニュウブツ ノ ドウテイ

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Abstract

The contaminants in a beverage product that had been reported to have a strange taste were identified. By comparative analysis with the normal product using liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (LC-QTOF-MS), six unknown compounds were detected in the total ion current chromatograms of the product in question. Detailed analysis of the mass spectra and product ion spectra of these compounds strongly suggested that the compounds were capric acid diethanolamide, lauric acid diethanolamide, myristic acid diethanolamide, lauryl dimethylaminoacetic acid, lauryl sulfate, and lauric acid, all of which are surfactants commonly used as ingredients of household detergents and shampoos. We searched commercially available detergent products to check for the presence of these six surfactants, and identified products that might have been intentionally or unintentionally mixed into the beverage product after opening.

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