The scientific research and new innovations are associated with the accurate and precise measurements which are crucial for operation of recent civilization. In order to maintain the precision and accuracy in analytical measurements, Reference Materials and Certified Reference Materials (CRMs) play a vital role for improving the measurement capability to obtain the property value close to its true value which in turn revamps the overall growth of country for better quality of life. Certified Reference Materials are basically used to assess the performance of analytical procedures and laboratory apparatus for authentic measurement data. In recent scientific world, many sophisticated instruments are emerging with their various facets of measurement capabilities to cater the need of high end research in the field of academia and industries. In recent years, powder X-ray diffraction (PXRD) has been shown as the most powerful characterization and non-destructive technique to explore the structural investigation in terms of phase identification, size of a unit cell, volume fraction of phases, site occupancy of different elemental component, anti-site defects in materials and having many more other applications. The identification of mentioned information from PXRD instrument is a basic need in material science, geology, polymer, forensic science and environment etc. This article focuses on the importance of CRMs for calibrating the instruments and validation of analytical methods. Also the article explicitly discuss about the importance and applications of PXRD technique together with the role of National Physical Laboratory, India the national institute of measurement NMI of India.

科学研究和新创新与精确和精确的测量有关，这对最近文明的运行至关重要。为了保持分析测量的准确性和准确性，参考材料和认证参考材料（CRM）在提高测量能力以获取接近其真实价值的财产价值方面起着至关重要的作用，从而反过来改善了国家的整体经济增长。更好的生活质量。经认证的参考材料基本上用于评估分析程序和实验室设备获得真实测量数据的性能。在最近的科学世界中，出现了许多具有各种测量能力的复杂仪器，以满足学术界和工业领域的高端研究需求。近年来，粉末X射线衍射（PXRD）已被证明是最有效的表征和非破坏性技术，它可以从相识别，晶胞大小，相的体积分数，位点的占有率等方面探索结构研究。不同的元素成分，材料中的抗局部缺陷以及更多其他应用。从PXRD仪器中识别提到的信息是材料科学，地质学，聚合物，法医科学和环境等方面的基本需求。本文重点介绍CRM在校准仪器和验证分析方法方面的重要性。文章还明确讨论了PXRD技术的重要性和应用，以及印度国家物理实验室（印度国家NMI研究所）的作用。