电工用铜中氧含量测定方法的研究

Analysis on Determination of Oxygen Content in Copper for Electrical Purpose

在电工用铜的氧含量测定方法中,惰气熔融-红外吸收法是目前普遍采用的测定方法。与传统酸洗法制备的测试样品相比,采用物理法制备的样品,其测定结果的准确性和一致性更好。对于氧含量较低的无氧铜以及高纯铜,测定的不确定度主要来源于标准物质,通过选用低氧含量的标准物质建立校准曲线,可以提高测定的准确性。在测定样品的氧含量前,特别是测定高纯铜样品前,根据所使用的仪器设备确定合适的分析参数,能够降低不确定因素引起的偏差。

Inert gas fusion infrared absorption method is widely used in the determination of oxygen content in copper for electrical purposes.Compared with the traditional picking process,the results of oxygen content of samples that prepared by physical method are accurate and consistent.For oxygen free copper and high pure copper with low oxygen content,the source of uncertainty is mainly derived from standard material.The accuracy of the test can be improved by establishing a calibration curve which is established by using low oxygen standard material.According to the difference of instruments used,appropriate analytical parameters should be determined to reduce the deviations caused by uncertainties,before testing the oxygen content of the sample,especially before the high purity copper sample.