FTIR OF SWEAT GLANDS & ALUMINUM SALTS 115 I I I I I I t I I i I 3000 :)500 I I I I Wavenumbers (CM '1 ) Figure 3. Infrared spectral comparison of stratum corneum and sweat proteins. A, untreated forearm stratum corneum. B, human albumin. C, human sweat protein. D, human glycoprotein. See Table I for complete description. in the C-H stretch region), an ACH-albumin complex must be considered as a possible species in plug #1. It is likely that contamination from nearby tissue in the plug samples could explain, alternatively, the stratum corneum-like C-H stretch region in
116 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS D 3500 3000 1500 1000 Wavenumbers (cM-•) Figure 4. Infrared spectra comparing in vivo plug # 1 with similar spectra. A, in vivo plug # 1. B, ACH- treated axillary stratum corneum. Stratum corneum was prehydrated for 72 hours, soaked in 20% ACH for 2.5 hours, and rinsed in water for 7 hours. C, ACH-albumin precipitate. D, ACH-sweat-protein precipi- tate.
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