Characterization of sampling behavior for multielements in NIST SRM 2703 |
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Authors: | Huang Donghui Sun Hongchao Ni Bangfa Tian Weizhi Zhang Yuanxun Wang Pingsheng Liu CunXiong Zhang Guiying Xiao Caijin Zhang Haiqing Zhao Changjun |
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Institution: | 1.Department of Nuclear Physics,China Institute of Atomic Energy,Beijing,China;2.Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai,China |
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Abstract: | Sampling behavior of multielements for NIST SRM 2703, a marine sediment, was studied with sample sizes from 1 mg down to ng level by a combination of INAA, PIXE and SRXRF. On 1 mg sample size level, sampling behavior for multielements in NIST SRM 2703 and its parent SRM 2702 were comparatively characterized by using INAA combining with Ingamells model. Results showed that sampling uncertainties for 12 elements of both materials were found to be better than 1%, and those of four other elements in SRM 2703 better than in SRM 2702. At sample sizes not able to be accurately weighed (<1 mg), PIXE and SRXRF were used and the effective sample sizes estimated. Sampling uncertainties for nine elements were found to be better than 1% at sample sizes of tenth mg level, and those for six elements better than 10% on ng levels. |
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