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

作者：Pienpinijtham Prompong^*; Thammacharoen Chuchaat; Naranitad Suwimol; Ekgasit Sanong

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2018, 197: 230-236.

DOI：10.1016/j.saa.2018.01.084

• Attenuated total reflection (ATR)
• Infrared spectroscopy
• Forensic science
• Hair
• Cosmetic
• Residue

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 pIRE 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 mu IRE 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.

• 出版日期2018-5-15