摘要
高频红外碳硫仪的缺点主要表现在测量成本过高,在碳硫的分析测试过程中,使用的耗材主要有干燥剂、坩埚、助熔剂(铁粉、钨粒)、氧气等。其中助熔剂所占分析成本的比例近50%。在保证分析质量的前提下,减少助熔剂的使用,对降低碳硫仪分析成本有着极为重要的意义。选取国家一级标准物质作为研究对象,称取0.05 g样品于灼烧好的坩埚中,分别添加不同质量的助熔剂覆盖于样品上,对每一种添加方案分五次测量,计算相对标准偏差和相对误差。结果表明,添加0.3 g铁粉和1.4 g钨粒的混合助熔剂,能达到很好的测量效果。选取六种土壤、水系沉积物的国家一级标准物质进行方法验证。验证实验表明,该方法的检出限、检测下限、精密度、准确度等各项指标均满足《多目标区域地球化学调查规范(1∶250000)》(DZ/T0258-2014)的要求。
The disadvantage of high frequency infrared carbon sulfur analyzer is that the measurement cost is too high,Flux accounts for nearly 50% of the analysis cost.On the premise of ensuring the analysis quality,reducing the use of flux is of great significance to reduce the analysis cost of carbon sulfur analyzer.The National first class standard material was selected as the research object,and 0.05 g sample was weighed in the burned crucible,and different mass fluxes were added to cover the sample.The relative standard deviation and relative error of each addition scheme were calculated by measuring five times.The results show that the mixed flux with 0.3 g iron powder and 1.4 g tungsten particle can achieve good measurement results.Six National first class standard material of soil and stream sediment were selected for method validation.The verification experiments show that the detection limit,detection limit,precision,accuracy and other indicators of the method meet the requirements of"Specification for multi-target regional geochemical survey(1∶250000)"(DZ/T 0258-2014).
作者
方雅琴
贾正勋
于晓琪
向兆
Fang Yaqin;Jia Zhengxun;Yu Xiaoqi;Xiang Zhao(HuBei Geological Research Laborarory,Wuhan 430034,China)
出处
《山东化工》
CAS
2021年第14期118-120,123,共4页
Shandong Chemical Industry
关键词
高频红外碳硫仪
助熔剂
全碳值
硫值
high frequency infrared carbon and sulfur analyzer
flux
total carbon
repeatability
