ISO 9891:1994 二氧化铀粉和烧结球中的碳含量测定 高频电感窑燃烧 滴定法/电量计法/红外线吸收.

标准编号：ISO 9891:1994

中文名称：二氧化铀粉和烧结球中的碳含量测定 高频电感窑燃烧 滴定法/电量计法/红外线吸收.

英文名称：Determination of carbon content in uranium dioxide powder and sintered pellets — High-frequency induction furnace combustion — Titrimetric/coulometric/infrared absorption methods

发布日期：1994-12

标准范围

规定的方法基于在氧气气氛中在至少1100℃至1200℃的温度下加热测试样品的一部分，使析出的氧化产物通过填充有二氧化锰催化剂和高锰酸盐银催化剂(其将CO氧化成CO2)的纯化阱，捕获CO2，通过恒电位滴定法或库仑法通过添加羟基离子连续恢复初始pH，或者通过IR吸收和对获得的信号积分测定CO2。适用于5 μ g~500 μ g碳的测定。

The methods specified are based on heating a portion of the test sample at a temperature of at least 1100 °C to 1200 °C in an oxygen atmosphere, passing the evolved oxidation products over a purification trap filled with manganese dioxide catalyst and silver permanganate catalyst (that oxidises CO to CO₂), trapping the CO_{2, restoring the initial pH continuously by addition of hydroxyl ions either by potentiostatic titrimetry or by coulometry, or alternatively determining the CO2 by IR absorption and integration of the signal obtained. Is applicable to the determination of 5 μg to 500 μg of carbon.}

标准预览图