粉末X射线衍射 （PXRD）作为一种非破坏性分析技术，因其高效、准确和灵敏的特点，广泛应用于药物晶型的鉴定和分析。 PXRD通过测量X射线与药物粉末样品之间的衍射模式，能够提供关于晶体结构的详细信息。 本篇文章将深入探讨PXRD在药物晶型鉴定中的关键作用，同时，我们将介绍PXRD的工作原理及其在药物晶型分析中的应用实例，并向大家推荐我们的表征检测服务内容（薇：jia009077）。 1.什么是药物晶型？ 药物晶型是指药物分子在固态下的不同排列方式， …

2019年7月23日 · Powder X-ray diffraction (XRD) is a common characterization technique for nanoscale materials. Analysis of a sample by powder XRD provides important information that is complementary to various microscopic and spectroscopic methods, such as phase identification, sample purity, crystallite size, and, in some cases, morphology.

Powder X-ray diffraction (PXRD) operates under the assumption that the sample is randomly arranged. Therefore, a statistically significant number of each plane of the crystal structure will be in the proper orientation to diffract the X-rays.

There are two types of X-ray sources: sealed X-ray tubes and rotating anode X-ray tubes. When copper is used as the target metal, the power of the sealed tube source will be approximately 2 kW and that of the rotating anode X-ray tube will be 9 …

2020年5月14日 · X-ray diffraction (XRD) is the only laboratory technique that reveals structural information, such as chemical composition, crystal structure, crystallite size, strain, preferred orientation and layer thickness.

2024年12月11日 · In XRD, an X-ray beam passes through a divergence slit and is directed onto the sample’s surface. The beam is scattered back by the periodic crystal lattice, causing interference and X-ray diffraction. When the incident beam satisfies BRAGG’s law (2dSinƟ = nλ) an X-ray diffraction pattern (peaks or enhanced interference) is obtained. Where:

In powder X-ray diffraction, the diffraction pattern is obtained from a powder of the material, rather than an individual crystal. Powder diffraction is often easier and more convenient than single crystal diffraction since it does not require individual crystals be made.

Powder XRD is mainly used for structural analysis of microcrystalline solid materials or powder samples. The main benefits of powder diffraction is that sample preparation is often very easy and straightforward. Typically powder XRD instruments use standard X-ray tubes providing a line focus divergent X-ray beam in Bragg-Brentano geometry.

fication of compounds or mixtures of compounds in samples of interest. XRD operates by scattering a collimated beam of x-rays of of a specimen over a range of angles, and measuring the intensi.

2024年10月12日 · 粉末X射线衍射（PXRD）作为一种非破坏性分析技术，因其高效、准确和灵敏的特点，广泛应用于药物晶型的鉴定和分析。 PXRD通过测量X射线与药物粉末样品之间的衍射模式，能够提供关于晶体结构的详细信息。