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An overview of calibration materials used in thermal analysis-benzoic acid

机译:热分析中使用的校准材料概述-苯甲酸

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摘要

There are a number of substances used to calibrate various instruments with benzoic acid being an IUPAC recommended calibration material. It has gained recognition as a reference material because it exhibits an "ideal" behavior. Hence, benzoic acid is often used to aid in determining the enthalpy of sublimation values for various organic substances. In this study, the thermal behavior of benzoic acid is observed from a simultaneous thermogravimetry-differential thermal analysis (TG-DTA) unit. A series of tests under various experimental conditions is performed, and the results allow for the determination of the enthalpy of sublimation values for benzoic acid. The purpose of this study is to investigate the influence of experimental parameters, such as sample preparation procedures, heating rates, atmospheric conditions, and gas flow rates, on the calculated enthalpy of sublimation values. Enthalpy of vaporization for benzoic acid was also calculated. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 8]
机译:用于校准各种仪器的物质很多,其中苯甲酸是IUPAC推荐的校准材料。由于它表现出“理想”的行为,因此已被认可为参考材料。因此,经常使用苯甲酸来帮助确定各种有机物质的升华值的焓。在这项研究中,从同时热重分析-差热分析(​​TG-DTA)单元观察到苯甲酸的热行为。在各种实验条件下进行了一系列测试,结果可以确定苯甲酸的升华焓值。这项研究的目的是研究实验参数(例如样品制备程序,加热速率,大气条件和气体流速)对升华值的计算焓的影响。还计算了苯甲酸的蒸发焓。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:8]

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