天津欧捷科技代理瑞士santis,英国labco,美国alpha,德国元素elementar,美国thermo等品牌耗材
Inorganic , Mineral
Unit Size: 1 g
IAEA-B-4 was obtained from a composite sample of euhedral crystals of black tourmaline, near San Piero in Campo, Elba Island, and was prepared by the Istituto di Geoscienze e Georisorse, Pisa, Italy. Prior distribution into polyethylene bottles, the material was ground to a grain size ranging between 5 µm to 40 µm with a few larger grains of 100 µm, mixed and homogenized [1]. The recommended values of the quality control material are the results of the statistical evaluation of an interlaboratory comparison [2].
Analyte | Value | Unit | SD | R/I/C |
---|---|---|---|---|
δ11B | -8.7 | ‰NBS 951 | 0.2 | R |
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)