Analytical sciences : the international journal of the Japan Society for Analytical Chemistry · 2020
Development of Human Hair Reference Material Supporting the Biomonitoring of Methylmercury.
СтатьяНазвание и аннотация: Перевод в очереди
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Haraguchi Koichi, Sakamoto Mineshi, Matsuyama Akito, Yamamoto Megumi, Hung Dang T, Nagasaka Hiromitsu, Uchida Keisuke, Ito Yasunori, Kodamatani Hitoshi, Horvat Milena, Chan Hing M, Rand Matthew, Cirtiu Ciprian M, Kim Byoung-Gwon, Nielsen Flemming, Yamakawa Akane, Mashyanov Nikolay, Panichev Nikolai, Panova Elena, Watanabe Tomoaki, Kaneko Naoki, Yoshinaga Jun, Herwati Ranny F, Suoth Alfrida E, Akagi Hirokatsu
Аннотация
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.