ASTM C761-24
六氟化鈾的化學 質譜 光譜 核和放射化學分析的標準測試方法
Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium Hexafluoride
- 標準號
- ASTM C761-24 中文首頁
- 發(fā)布
- 2024年
- 總頁數(shù)
- 28頁
- 發(fā)布單位
- 美國材料與試驗協(xié)會
- 當前最新
- ASTM C761-24
- 適用范圍
- The TTA test method covers the determination of 237 Np mass fraction in UF6. Np can be selectively extracted from an aqueous solution into a TTA-xylene solution, and a 239 Np tracer technique can be used to measure extraction losses; thereby, eliminating the need for a more laborious quantitative extraction. Neptunium can also be determined using Guide C1561. Determination of soluble chromium mass fraction in UF6 The test method is based on the elemental mass of uranium in the range from 0.2 μg/g to 100 μg/g. The UF6 is filtered through a porous filter, and the filtered sample is hydrolyzed in deionized water. Chromium is separated from uranium using an n-tributyl phosphate (TBP)-xylene mixture, leaving chromium in the aqueous phase. Chromium is determined by atomic absorption spectroscopy after dilution to a standard volume.
| 術語 | 描述 |
|---|---|
| Alpha Counter Alpha Counter | An instrument used to measure alpha particle emissions. |
| Gamma Scintillation Spectrometer Gamma Scintillation Spectrometer | A device used to detect and analyze gamma radiation emissions. |
ASTM C761-24 中提到的儀器設備
| Alpha Counter 背景計數(shù)率小于5 cpm | 用于測量樣品中的 alpha 活性 |
| Gamma Scintillation Spectrometer 單道分析儀或多元道儀器 | 用于檢測和分析 239 Np 的 gamma 輻射 |