摘要
样品0.100 0 g置于坩埚中,加入铁屑助熔剂0.50 g,钨锡助熔剂1.50 g,在马弗炉中于400℃灼烧1 h。冷却后,向坩埚中缓慢分批加入硝酸(1+9)溶液至无气泡冒出。样品于110℃烤干后,采用高频燃烧-红外吸收光谱法测定样品中固定碳的含量。按上述方法分析2个国家标准物质(GBW 03118,GBW 03119),其测定值与认定值一致,测定值的相对标准偏差(n=6)分别为1.1%,0.30%。
The sample （0. 100 0 g） was placed into a crucible, and 0. 50 g of iron scurf flux and 1. 50 g of tungsten tin flux were added into the crucible. The mixture in the crucible was burning at 400 ℃ for lh in a muffle furnace. After cooling, HNO3 （1＋9） solution was added slowly in portions into the crucible until free of bubbles. After drying at 110 ℃, high frequency combustion-infrared absorption spectrometry was applied to determination of fixed carbon in the sample. 2 CRMs （GBW 03118, GBW 03119） were analyzed by the proposed method, giving results in consistency with the certified values, and RSDs （n=6） of 1.1% for GBW 03118 and 0. 30% for GBW 03119.
出处
《理化检验（化学分册）》
CSCD
北大核心
2017年第10期1188-1191,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
中国地质调查局地质调查项目(DD20160070
DD20160073)
关键词
高频燃烧-红外吸收光谱法
槽探样品
固定碳
high frequency combustion-infrared absorption spectrometry
trenching sample
fixed carbon
