Quantification of fat-soluble vitamins in human breast milk by liquid chromatography-tandem mass spectrometry

Maya Kamao, Naoko Tsugawa, Yoshitomo Suhara, Akimori Wada, Toshiyuki Mori, Kazuo Murata, Riichiro Nishino, Tetsuya Ukita, Kazuhiro Uenishi, Kiyoshi Tanaka, Toshio Okano

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

Sensitive quantification method for fat-soluble vitamins in human breast milk by liquid chromatography-tandem mass spectrometry was developed. Vitamins A, D and E were extracted from 10.0 mL of breast milk after saponifying by basic condition. Vitamin K derivatives were extracted from 3.0 mL of breast milk after lipase treatment. The corresponding stable isotope-labeled compounds were used as internal standards. For the determination of vitamin D compounds, derivatization with a Cookson-type reagent was performed. All fat-soluble vitamins were determined by liquid chromatography-tandem mass spectrometry in the positive ion mode. The detection limits of all analytes were 1-250 pg per 50 μL. The recoveries of fat-soluble vitamins were 91-105%. Inter-assay CV values of each vitamin were 1.9-11.9%. The mean concentrations of retinol, vitamin D3, 25-hydroxyvitamin D3, α-tocopherol, phylloquinone and menaquinone-4 were 0.455 μg/mL, 0.088 ng/mL, 0.081 ng/mL, 5.087 μg/mL, 3.771 ng/mL, and 1.795 ng/mL, respectively (n = 82). This method makes possible to determine fat-soluble vitamins with a wide range of polarities in human breast milk. The assay may be useful for large-scale studies.

Original languageEnglish
Pages (from-to)192-200
Number of pages9
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume859
Issue number2
DOIs
Publication statusPublished - 2007 Nov 15

Keywords

  • Breast milk
  • Fat-soluble vitamins
  • Liquid chromatography-tandem mass spectrometry
  • Vitamin A
  • Vitamin D
  • Vitamin E
  • Vitamin K

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

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