Analysis of cosmetic residues on a single human hair by ATR FT-IR microspectroscopy

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Prompong PienpinijthamSanong Ekgasit

Abstract

In this work, ATR FT-IR spectra of single human hair and cosmetic residues on hair surface are successfully collected using a homemade dome-shaped Ge μIRE accessary installed on an infrared microscope. By collecting ATR spectra of hairs from the same person, the spectral patterns are identical and superimposed while different spectral features are observed from ATR spectra of hairs collected from different persons. The spectral differences depend on individual hair characteristics, chemical treatments, and cosmetics on hair surface. The "Contact-and-Collect" technique that transfers remarkable materials on the hair surface to the tip of the Ge μIRE enables an identification of cosmetics on a single hair. Moreover, the differences between un-split and split hairs are also studied in this report. These highly specific spectral features can be employed for unique identification or for differentiation of hairs based on the molecular structures of hairs and cosmetics on hairs.

Citations

Jul 31, 2020·Analytical Methods : Advancing Methods and Applications·Fernando ContrerasDmitry Kurouski
Sep 13, 2019·Environmental Science and Pollution Research International·Orlando de Paris JúniorHelen Treichel
Feb 12, 2021·Colloids and Surfaces. B, Biointerfaces·Ying TangLei Liu
Nov 9, 2018·Analytical Chemistry·Ewelina MistekIgor K Lednev

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