Heat capacity measurements by computer-interfaced DSC
Heat capacity measurements by computer-interfaced DSC
复制标题
DOI：
10.1007/bf01909910
复制
发表时间：
1978-02
期刊：
影响因子：
--
通讯作者：
U. Gaur;A. Mehta;B. Wunderlich
中科院分区：
文献类型：
--
作者：
U. Gaur;A. Mehta;B. Wunderlich
利用商用元器件设计了一套计算机辅助热容测量系统。珀金-埃尔默DSC-2型差示扫描量热计构成了从100到1000 K测量的基础。9821型惠普计算器（小型计算机）是数据处理系统。数据被收集并永久存储在磁带上。该程序已编写，以控制测量和最终计算，制表，绘图和曲线拟合。校准是通过与苯甲酸或氧化铝（蓝宝石）比较来完成的。锌热容的测量作为一个例子，并评价其准确性。已经实现了优于±0.5%的精度，与没有计算机辅助的类似系统相比，大约提高了3到5倍。该系统将主要用于线性大分子的热容分析。
A computer assisted heat capacity measuring system has been designed from commercial components. A differential scanning calorimeter of type Perkin-Elmer DSC-2 forms the basis for measurements from 100 to 1000 K. A Hewlett-Packard calculator (minicomputer) of type 9821 is the data handling system. The data are collected and permanently stored on teletape. The program has been written to govern measurement and final computation, tabulation, plotting, and curve fitting. Calibration is done by comparison with benzoic acid or aluminium oxide (sapphire). Zinc heat capacities have been measured as an example and for evaluation of accuracy. Accuracies of better than ± 0.5% have been achieved, an improvement of approximately a factor 3 to 5 over a similar system without computer assist. The system will be used mainly for heat capacities of linear macromolecules.