毛髪中の微量元素に関する研究(第2報)金属元素の毛髪への吸着および毛髪からの溶出

抄録

Hair samples were collected from 10 persons of whom 5 had been subjected to permanent waving treatment and the others had never been treated. Samples were cut into small pieces (about 5 mm), mixed thoroughly and washed with acetone-ethanol mixture (1 : 1) prior to experiments. 1. Adsorption : When the hair samples were soaked in the solutions containing metal ions, the ions were adsorbed on the hairs, particularly on the permanent waved ones. The relative degree of adsorption was Hg»Cu≒Pb>Cd≒Zn≒Ni≒Co>Ba≒Sr>Ca≒Mg»K>Na. 2. Elution : Hg was scarcely removed from the hair samples by soaking in deionized water and dilute HCl (1→20). Elution of Pb and Cu from the hair samples showed two types. The first one was similar to that of Hg, observed in the samples which contained relatively small amount of Pb or Cu, less than 30 ppm. The second type was observed in the samples containing Pb or Cu more than 30 ppm. From these samples, some extent of Pb or Cu were removed by soaking in water or dilute HCl (1→20) until the contents became to a similar level to those of the first type, and these elements were no longer removed further. A small portion of Ca, Mg, Zn, Co, Ni, and Cd in the hair samples was removed by soaking in water, and almost whole amount of them was removed by soaking in dilute HCl (1→20). On the other hand a large portion of Na and K was removed from the hair samples by soaking in water.