CAJ | 학술논문

传统的碳酸钠-氧化锌半熔-硫酸钡重量法测定重晶石中的硫，具有坩埚腐蚀小、干扰相对较少等优点，但不能完全破坏重晶石矿物的晶格结构，造成了硫的测定结果很不稳定。本文通过考察重晶石半熔分解过程中实验条件对硫的转化率的影响，发现重晶石分解转化不彻底主要是由于样品粒度和熔剂粒度过粗，故将传统的半熔法的实验条件改进为：采用瓷坩埚熔融，重晶石样品粒度小于0.10 mm，碳酸钠-氧化锌熔剂粒度小于0.18 mm，半熔温度790℃，半熔时间60 min。在此实验条件下重晶石可全部转化为BaCO3与SO2-4定量分离，因此不用使用昂贵的铂金坩埚，也避免了强氧化性熔剂对坩埚的损毁，减少了熔融时可能引入的干扰物质。本方法精密度（RSD）小于1.0％，硫的转化率大于99.5％，适用于分析含重晶石的各类复杂地质样品。
전통적탄산납-양화자반용-류산패중량법측정중정석중적류，구유감과부식소、간우상대교소등우점，단불능완전파배중정석광물적정격결구，조성료류적측정결과흔불은정。본문통과고찰중정석반용분해과정중실험조건대류적전화솔적영향，발현중정석분해전화불철저주요시유우양품립도화용제립도과조，고장전통적반용법적실험조건개진위：채용자감과용융，중정석양품립도소우0.10 mm，탄산납-양화자용제립도소우0.18 mm，반용온도790℃，반용시간60 min。재차실험조건하중정석가전부전화위BaCO3여SO2-4정량분리，인차불용사용앙귀적박금감과，야피면료강양화성용제대감과적손훼，감소료용융시가능인입적간우물질。본방법정밀도（RSD）소우1.0％，류적전화솔대우99.5％，괄용우분석함중정석적각류복잡지질양품。
The traditional sodium carbonate-zinc oxide semi fusion method causes little corrosion of the crucible and effects small interferences,but the analytical results of sulfur are unstable due to an incomplete break of the lattice structure of barite. The decomposition conditions during semi fusion that affect the conversion of sulfur are investigated and reported in this paper. Results show that the incomplete decomposition of barite was due to the grain sizes of samples and fluxes being too big. The modified method is that samples with sizes of less than 0. 1 mm mixed with sodium carbonate-zinc oxide flux with sizes of less than 0. 18 mm are decomposed at 790℃ for 60 min. Under these conditions,barite can be converted to BaCO3 and isolated with SO2-4 quantitatively through semi molten decomposition in a porcelain crucible,which avoids the use of the platinum crucible,damage of crucibles by strong oxidizing agents,and reduces the interference substances during melting. The RSD for this method was less than 1% and the conversion of sulfur was more than 99 . 5%. This method can be applied to determine sulfur content of complex geological samples containing barite.