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  • 1 Department of Radiology, Po Jen General Hospital, Taipei, 105 Taiwan
  • | 2 Department of Family Medicine, Po Jen General Hospital, Taipei, 105 Taiwan
  • | 3 Department of Nuclear Medicine, Chung Shan Medical University Hospital, Taichung, 40201 Taiwan
  • | 4 School of Medicine, Chung Shan Medical University, Taichung, 40201 Taiwan
  • | 5 Department of Medical Image, Chung Shan Medical University Hospital, Taichung, 40201 Taiwan
  • | 6 School of Medical Imaging and Radiological Sciences, Chung Shan Medical University, No. 110, Sect. 1, Jianguo N. Rd., Taichung, 40201 Taiwan
  • | 7 School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, 40201 Taiwan
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Abstract  

Hair samples from junior high school students in metropolitan areas of Taichung, Taiwan were tested for a total of 13 elements, Al, Ag, Br, Cl, Cr, Fe, K, La, Mn, Na, Sc, Se, and Zn by instrumental neutron activation analysis (INAA) to establish seasonal variations, gender and environmental exposures. The seasonal variations of hairs in 39 healthy students (18 males and 21 females; age 13.3 ± 0.4 years; height, 158.0 ± 4.1 cm; weight, 53.4 ± 5.7 kg) were collected at 1.5-month intervals for 1 year starting from late August, 2008. The concentrations of the above elements varied from 103 to 10−2 μg g−1 at different sampling times. A quantified index of agreement (AT) was introduced to help classify the elements. A smaller AT indicated highly consistent quantities of specific metals in the hair while a larger AT indicated increased fluctuation, i.e., less agreement. The different ATs in various hair samples were discussed. The concentrations of these elements are compared with the data in the literature.