Abstract:
:Head hair concentrations of zinc, copper, manganese, alid iron from a total of 418 subjects (154 male and 264 female) aged between 6 mo and 20 yr were measured mainly with flameless atomic absorption spectrophotometry. Only zinc analysis of a part of the female samples (n = 140) were analyzed with inductively coupled plasmaatomic emission spectrometry. The two analytical methods showed close agreement. The mean concentration of copper and manganese were significantly higher in male subjects than in female subjects. The trace element concentrations in hair varied with the subject's age. Zinc concentration in hair decreased from 6 mo to 14 yr in the male subjects and decreased from 6 mo to 12 yr in the female subjects. Then, the concentrations increased gradually to 20 yr in the both sexes. Age-dependent variations of copper and manganese concentrations in hair showed similar trends to those of zinc. The results of this study suggest that a higher concentration in the diet of these trace elements may be required for growing children, especially in the period of adolescence.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Sakai T,Wariishi M,Nishiyama Kdoi
10.1385/BTER:77:1:43subject
Has Abstractpub_date
2000-10-01 00:00:00pages
43-51issue
1eissn
0163-4984issn
1559-0720pii
BTER:77:1:43journal_volume
77pub_type
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