A method for quantifying non-esterified cis-9,trans-11-conjugated linoleic acid in finger-prick plasma by LC/ESI-MS/MS with isotope-coded derivatization. - Maeda K; Ichimura H; Ogawa S; Ito E; Sugimoto S; Sasahara T; Kawamura S; Matsunaga K; Higashi T (Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 2026)