高热硫酸溶解重量法测定矿石中的钡

Gravimetric Determination of Barium in Ores with High Temperature Sulfuric Acid Sample Dissolution

摘要: 利用BaSO4在高热H2 SO4中能定量地形成液态Ba(HSO4) 2 ,而当含Ba(HSO4) 2 的浓H2 SO4溶液被稀释时 ,又能重新定量析出BaSO4这一性质 ,拟定出高热H2 SO4溶解重量法测定矿石中的钡。方法用于矿石、重晶石单矿物中BaO和BaSO4的测定 ,结果与碱熔BaSO4重量法、BaCrO4容量法、外检结果相一致 ,精密度试验结果 ,相对标准偏差RSD(n =1 0 ) <5 %。

Abstract: Based on the principle of transformation of BaSO 4 to soluble Ba(HSO 4) 2 in concentrated sulfuric acid with high temperature and then changing back to BaSO 4 quantitatively when Ba(HSO 4) 2 solution was diluted and cooled to room temperature, a met