Hair Mineral Analysis by X-Ray Fluorescence Spectrometry: Associations with Body Fat

X-光螢光分析儀分析之頭髮礦物質及其與體脂肪之相關性

Katsuji Uetake ； Toshio Tanaka

《Asia Pacific Journal of Clinical Nutrition》 22卷2期 (2013/04) Pp. 257-260

https://doi.org/10.6133/apjcn.2013.22.2.14

摘要

Hair mineral analysis using an X-ray fluorescence spectrometer as a method of estimating body fat percentage (BF%) was investigated. Body fat percentage of 24 healthy Japanese, aged 20-27 years, was measured using a hand-held impedance analyzer (BF%IMP). X-ray (Kα-ray) intensities of sulfur, chlorine, potassium, calcium, titanium, and iron (Fe) in hair were measured using an X-ray fluorescence spectrometer. Body fat percentage was also measured using a Hologic whole body dual energy X-ray absorptiometer (BF%DXA) in nine subjects selected from the above 24 subjects based on their BF%IMP. Correlations of the two BF%s with Fe-Kα were significant (BFIMP: r = 0.60 n = 24, p ＜0.01; BFDXA: r = 0.67 n = 9, p＜0.05). The mean (±SD) biases (measured minus estimated using multiple regression equations by Fe-Kα) for BF%IMP and BF%DXA were 2.97 ± 2.25% and 1.77 ± 1.33%, respectively. The SEEs for the two equations for BF%IMP and for BF%DXA were less than 4%. These results suggest that Fe-Kα may be a predictor of body fat percentage. However, the subjects were few and only Japanese in their twenties, so that further investigation is needed for methodological generalization.

關鍵字

體脂肪百分比 ； 頭髮礦物質含量 ； 日本人 ； 預測方程式 ； X-光螢光分析儀

並列摘要

Hair mineral analysis using an X-ray fluorescence spectrometer as a method of estimating body fat percentage (BF%) was investigated. Body fat percentage of 24 healthy Japanese, aged 20-27 years, was measured using a hand-held impedance analyzer (BF%IMP). X-ray (Kα-ray) intensities of sulfur, chlorine, potassium, calcium, titanium, and iron (Fe) in hair were measured using an X-ray fluorescence spectrometer. Body fat percentage was also measured using a Hologic whole body dual energy X-ray absorptiometer (BF%DXA) in nine subjects selected from the above 24 subjects based on their BF%IMP. Correlations of the two BF%s with Fe-Kα were significant (BFIMP: r = 0.60 n = 24, p ＜0.01; BFDXA: r = 0.67 n = 9, p＜0.05). The mean (±SD) biases (measured minus estimated using multiple regression equations by Fe-Kα) for BF%IMP and BF%DXA were 2.97 ± 2.25% and 1.77 ± 1.33%, respectively. The SEEs for the two equations for BF%IMP and for BF%DXA were less than 4%. These results suggest that Fe-Kα may be a predictor of body fat percentage. However, the subjects were few and only Japanese in their twenties, so that further investigation is needed for methodological generalization.

並列關鍵字

body fat percentage ； hair mineral content ； Japanese ； prediction equations ； X-ray fluorescence spectrometer

參考文獻

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