Abstract
The effect of age and gender on minor and trace element contents in the scalp hair of 80 relatively healthy 15- to 55-year-old women and men was investigated. Contents or upper limit of contents of 37 chemical elements in the scalp hair were determined by instrumental neutron activation analysis. Mean values (M ± SΕΜ) for the mass fraction of Ag, Au, Ba, Br, Ca, Ce, Cl, Co, Cr, Eu, Fe, Hf, Hg, I, K, La, Lu, Mg, Mn, Na, Rb, Sb, Sc, Se, Sm, Sr, Th, and Zn (milligrams per kilogram of dry hair) were 0.191 ± 0.018, 0.0102 ± 0.0014, 6.33 ± 0.68, 3.59 ± 0.26, 1320 ± 110, 0.369 ± 0.055, 1245 ± 133, 0.0707 ± 0.0054, 2.78 ± 0.22, 0.0082 ± 0.0021, 88.2 ± 6.7, 0.040 ± 0.012, 0.145 ± 0.009, 6.93 ± 1.05, 146 ± 14, 0.238 ± 0.025, 0.0030 ± 0.0007, 163 ± 17, 2.29 ± 0.30, 344 ± 31, 0.65 ± 0.10, 0.062 ± 0.005, 0.0100 ± 0.0012, 0.248 ± 0.008, 0.0090 ± 0.0010, 45.7 ± 3.5, 0.0168 ± 0.0019, and 154 ± 3, respectively. The upper limits of contents of Cd, Cs, Gd, Nd, Ta, Tb, Tm, and Yb were ≤0.17, ≤0.013, ≤0.104, ≤0.19, ≤0.011, ≤0.0048, ≤0.0057, and ≤0.0047, respectively. In all hair samples, the contents of As was under detection limits <0.01. The tendency for the Ce, La, and Th content to increase with age was found in the human hair, but statistically significant changes were shown for females only. The mass fraction of Rb in the male scalp hair increases and of Cl decreases with age. It was shown that higher Au, Ca, Mg, and Sr mass fractions as well as lower Cl, Fe, I, Sc, Se, and Sm content were typical of female hair as compared to those in male hair.
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Acknowledgments
We are grateful to Dr. Sergey Moiseev, Hospital Department of Forensic Medicine, Obninsk for supplying hair samples and Dr. Nikolay Dogadkin, Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow for the assistance in the INAA measurements.
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Zaichick, S., Zaichick, V. The Effect of Age and Gender on 37 Chemical Element Contents in Scalp Hair of Healthy Humans. Biol Trace Elem Res 134, 41–54 (2010). https://doi.org/10.1007/s12011-009-8456-0
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DOI: https://doi.org/10.1007/s12011-009-8456-0