Environmental Standard Section, National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan.
Anal Bioanal Chem. 2010 May;397(2):493-9. doi: 10.1007/s00216-010-3564-4. Epub 2010 Mar 5.
Arsenate [As(V)] solution reference material, National Metrology Institute of Japan (NMIJ) certified reference material (CRM) 7912-a, for speciation of arsenic species was developed and certified by NMIJ, the National Institute of Advanced Industrial Science and Technology. High-purity As(2)O(3) reagent powder was dissolved in 0.8 M HNO(3) solution and As(III) was oxidized to As(V) with HNO(3) to prepare 100 mg kg(-1) of As(V) candidate CRM solution. The solution was bottled in 400 bottles (50 mL each). The concentration of As(V) was determined by four independent analytical techniques-inductively coupled plasma mass spectrometry, inductively coupled plasma optical emission spectrometry, graphite furnace atomic absorption spectrometry, and liquid chromatography inductively coupled plasma mass spectrometry-according to As(V) calibration solutions, which were prepared from the arsenic standard of the Japan Calibration Service system and whose species was guaranteed to be As(V) by NMIJ. The uncertainties of all the measurements and preparation procedures were evaluated. The certified value of As(V) in the CRM is (99.53 +/- 1.67) mg kg(-1) (k = 2).
砷酸盐[As(V)]溶液标准物质，由日本国立计量研究所（NMIJ）认证的参考物质（CRM）7912-a 开发和认证，用于砷形态的特殊化。高纯 As(2)O(3)试剂粉末溶解在 0.8 M HNO(3)溶液中，并用 HNO(3)将 As(III)氧化为 As(V)，以制备 100 mg kg(-1)的 As(V)候选 CRM 溶液。该溶液分装在 400 个瓶子（每个 50 毫升）中。根据 NMIJ 保证其为 As(V)的日本校准服务系统的砷标准，通过四种独立的分析技术-电感耦合等离子体质谱法、电感耦合等离子体发射光谱法、石墨炉原子吸收光谱法和液相色谱-电感耦合等离子体质谱法，确定了 As(V)校准溶液的浓度，从而确定了 CRM 中 As(V)的浓度。评估了所有测量和制备程序的不确定度。CRM 中 As(V)的认证值为（99.53 +/- 1.67）mg kg(-1)（k = 2）。
