1. Development of Human Hair Reference Material Supporting the Biomonitoring of Methylmercury
- Author
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Mineshi Sakamoto, Hirokatsu Akagi, Flemming Nielsen, Byoung-Gwon Kim, Hing Man Chan, Dang T Hung, Keisuke Uchida, Nikolay Mashyanov, Megumi Yamamoto, Nikolai Panichev, Tomoaki Watanabe, Jun Yoshinaga, Ciprian M Cirtiu, Ranny F Herwati, Matthew D. Rand, Yasunori Ito, Koichi Haraguchi, Naoki Kaneko, Hitoshi Kodamatani, Alfrida E Suoth, Milena Horvat, Akito Matsuyama, Elena G. Panova, Hiromitsu Nagasaka, and Akane Yamakawa
- Subjects
Male ,Mercury speciation ,chemistry.chemical_element ,Methylmercury ,Zinc ,Methylmercury Compounds ,Analytical Chemistry ,Mercury (element) ,Human biomonitoring ,chemistry.chemical_compound ,Certified reference materials ,chemistry ,Vietnam ,Environmental chemistry ,Biomonitoring ,Humans ,Reference material ,Coverage factor ,Arsenic ,Selenium ,Hair - Abstract
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 mgkg -1; /inc. 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.
- Published
- 2020