著者

Koichi HARAGUCHI Mineshi SAKAMOTO Akito MATSUYAMA Megumi YAMAMOTO Dang T. HUNG Hiromitsu NAGASAKA Keisuke UCHIDA Yasunori ITO Hitoshi KODAMATANI Milena HORVAT Hing M. CHAN Matthew RAND Ciprian M. CIRTIU Byoung-Gwon KIM Flemming NIELSEN Akane YAMAKAWA Nikolay MASHYANOV Nikolai PANICHEV Elena PANOVA Tomoaki WATANABE Naoki KANEKO Jun YOSHINAGA Ranny F. HERWATI Alfrida E. SUOTH Hirokatsu AKAGI

出版者

The Japan Society for Analytical Chemistry

雑誌

Analytical Sciences (ISSN:09106340)

巻号頁・発行日

vol.36, no.5, pp.561-567, 2020-05-10 (Released:2020-05-10)

参考文献数

28

被引用文献数

5

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A certified reference material, NIMD-01, was developed for the analysis of mercury speciation in human hair. We collected the hair of Vietnamese males from a barbershop in Hanoi in 2016 and prepared 1200 bottles containing 3 g of sieved and blended hair powder. The certified value was given on a dry-mass basis, with the moisture content obtained by drying at 85°C for 4 h. Certified values with the expanded uncertainties (coverage factor, k = 2) were as follows: methylmercury, 0.634 ± 0.071 mg kg−1 as mercury; total mercury, 0.794 ± 0.050 mg kg−1; copper, 12.8 ± 1.4 mg kg−1; zinc, 234 ± 29 mg kg−1; selenium, 1.52 ± 0.29 mg kg−1. An indicative arsenic concentration of 0.17 ± 0.03 mg kg−1 was measured. Extended uncertainties were estimated by sample homogeneity, long- and short-term stabilities, and a characterization from measurements made by collaborating laboratories.