GB 14883.10-2016 Translated English of Chinese Standard. GB14883.10-2016: National Food Safety Standard - Examination of Radioactive Materials for Foods - Determination of Cesium-137https://www.chinesestandard.net, 3.5.2019 - 17 sivua This Standard is applicable to the determination of cesium-137 (137Cs) in various foods. |
Sisältö
| 3 | |
Scope | 4 |
Analytical Procedures | 5 |
Expression of Analytical Result | 7 |
Others | 8 |
Instruments and Equipment | 10 |
Expression of Analytical Result | 13 |
Method3 Cobalt Potassium Ferricyanide | 14 |
Expression of Analytical Result | 15 |
Appendix A Total Correction Factor of 137Cs Measurement Efficiency at Different Heights and Apparent Densities | 16 |
Appendix B Lower Detection Limit of 137Cs Radioactivity | 17 |
Yleiset termit ja lausekkeet
137Cs Measurement Efficiency 137Cs standard radioactive 137Cs standard solution absolute ethanol accordance with Formula acetic acid solution add water Ammonium molybdate Ammonium nitrate apparent density Bismuth trioxide calculate its apparent centrifuge tube cesium carrier solution Cesium chloride cesium iodine bismuthate cobalt potassium ferricyanide concentration in foods Conduct centrifugation constant mass cool count rate Counting Efficiency detection efficiency scale dilute to 100 discard the supernatant energy scale ethanol to rinse europium expressed in cpm extract and filter filter paper full energy peak germanium glacial acetic acid height of 137Cs hydrochloric acid iodine bismuthate sediment low background Mass Curve mL beaker mL of absolute mL of cesium mL of glacial mL of water nitric acid nitric acid solution Oxalic acid radioactivity of 137Cs reaches a constant rinse the beaker rinse the sediment room temperature sample box Sampling and Pretreatment sodium hydroxide standard radioactive source water to dilute weigh-take