随着生产、贸易和科学技术的发展，分析测试工作的重要性越来越突出，对测试结果的可靠性和准确性也提出了更高的要求。由于核燃料生产关系到核安全，产品具有放射性和化学毒性，核保障对物料平衡要求严格，也就决定了核工业的分析检验的重要性和特殊性，即精度高、准确度高、 With the development of production, trade and science and technology, the importance of analysis and testing work has become more and more prominent, and the reliability and accuracy of test results have also set higher requirements. Since the production of nuclear fuel is related to nuclear safety, the products are radioactive and chemically toxic, and the requirements for the material balance of nuclear security are strict, which also determines the importance and particularity of the analysis and inspection of the nuclear industry, namely, high precision and high accuracy,