Evaluation of the Deterioration in Mink Hair under Xenon Arc Irradiation by Fourier Transform Infrared (FTIR) Microspectroscopy

抄録

The protein deterioration in mink hair under xenon arc irradiation was quantitatively evaluated by fourier transform infrared microspectroscopy (FTIR). Guard hairs of green skin of sapphire mink, tanned sapphire mink, green skin of dark mink and tanned dark mink were irradiated with a xenon lamp for 96 hours and subjected to FTIR analysis. Differential spectra taken in the wave number range of 1350_??_900cm^-1 demonstrated that the absorption intensity at 1040cm^-1 due to the -SO₃^- of the cysteic acid residues produced in irradiated hair was proportional to the irradiation time in the range of 12_??_96 hours. The relation between the both was expressed by a linear regression equation of y=ax (y: peak height or peak area of IR absorption, x: irradiation time, a: slope), the slope of the regression equation for dark mink was smaller than for sapphire mink, and so was for tanned skin than for green skin. The present method enables to evaluate the difference in the degree of deterioration among different and differrently processed mink hair samples.