...
首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Real-time measurement of the growth rates of individual crystal facets using imaging and image analysis - A feasibility study on needle-shaped crystals of L-glutamic acid
【24h】

Real-time measurement of the growth rates of individual crystal facets using imaging and image analysis - A feasibility study on needle-shaped crystals of L-glutamic acid

机译:实时测量的增长率个人水晶方面使用成像和图像分析-针状的可行性研究晶体L-glutamic酸

获取原文
获取原文并翻译 | 示例
           

摘要

Given that the fundamental process of crystal growth and its associated kinetic control is surface controlled, the use of a single scalar parameter, particle size, usually defined as a volume equivalent diameter, i.e., based on a spherical assumption of particle shape can be misleading for a number of practical crystallization systems, notably pharmaceutical products. Hence, measurement of the growth rate for each individual crystal surface in real-time and within processing reactors could open the way for the development of more effective process and concomitant product quality control. This paper presents the measurement of the growth rates of needle-shaped crystals in two dimensions using on-line imaging and image analysis techniques through a feasibility study of the batch crystallization of G form L-glutamic acid. The length and width of each needle-shaped crystal were measured every 60 s, ranging from 100 to nearly 180 mu m in length and from 30 to 45 mu m in width, and the values were used to estimate growth rates on both directions. The growth rate in length was found to be four to six times greater than for the width. The (101) plane was found to be the fastest growing surface of the morphology studied and an attempt has been made to estimate its growth-kinetics parameters from measurements of length, whilst it was harder to estimate kinetics from measurements of width for other crystal facets.
机译:考虑到晶体的基本过程增长及其相关的动力学控制面控制,使用一个标量参数,颗粒大小,通常定义为一个体积当量直径,即基于球形颗粒形状的假设误导的实用结晶系统,特别是制药产品。为每个单独的晶体表面实时和在处理反应堆可以开放发展的更有效的过程同时产品质量控制。介绍了测量的增长率针状晶体在二维空间中使用在线成像和图像分析技术通过批处理的可行性研究L-glutamic酸结晶G的形式。长度和宽度的针状晶体测量每隔60年代,从100年到吗近180μm的长度,从30到45μm宽,被用来估计的值增长率两个方向。长度被发现四到六次大于宽度。增长最快的表面形态学研究和尝试其生长台阶参数估计测量长度,而更难从测量的宽度估计动力学其他水晶方面。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号