Trace Analysis of Human Skin Secretions by Surface-Enhanced Infrared Spectroscopy: Detection of Lactate

Abstract

Surface-enhanced infrared spectroscopy was applied to the trace analysis of secretions on human skin. The secretions were transferred onto silver-coated barium fluoride substrates by pressing the substrates on the skin at several parts of the human body (wrist, palm, cheek, abdomen and sole). The infrared spectra of the substrates were measured by the transmission mode. Small amounts of lactate, triglycerides, fatty acids and fatty acid esters were identified from the secretions. For detecting lactate, the sole is the best sampling point on the human body. © 1993, The Japan Society for Analytical Chemistry. All rights reserved.