CAJ | 학술논문

基于用碱熔法分解试样,试样溶液经酸化后无需分离作为母液备用.一份在适当的硫酸和盐酸溶液中,隔绝空气条件下,用铝将四价钛还原后,直接用硫酸铁铵滴定钛;另一份在适当酸度溶液中,用氯化亚锡将大量铁还原,再加三氯化钛将剩余少量铁还原后,用重铬酸钾标液滴定铁.本方法实现了钛铁矿中钛和铁的快速联测,简化了重复熔样,缩短了分析时间,测定全铁的相对标准偏差(n=6)小于0.30%,TiO_2相对标准偏差(n=6)小于0.90%;测定标准样品,结果与认定值相符合,满足了生产分析要求.
기우용감용법분해시양,시양용액경산화후무수분리작위모액비용.일빈재괄당적류산화염산용액중,격절공기조건하,용려장사개태환원후,직접용류산철안적정태;령일빈재괄당산도용액중,용록화아석장대량철환원,재가삼록화태장잉여소량철환원후,용중락산갑표액적정철.본방법실현료태철광중태화철적쾌속련측,간화료중복용양,축단료분석시간,측정전철적상대표준편차(n=6)소우0.30%,TiO_2상대표준편차(n=6)소우0.90%;측정표준양품,결과여인정치상부합,만족료생산분석요구.
The samples were decomposed by alkali fusion method. The sample solution could be used after acidification without separation. The titanium(Ⅳ)in one sample solution was reduced by aluminum in proper H_2SO_4-HCI medium in the absence of air, and then it was directly titrated with ferric ammo-nium sulfate solution. The large quantity of iron in another solution was reduced by stannous chloride in proper acid solution, and the residual little iron was reduced by adding titanium triehloride, and then it was titrated with potassium dichromate standard solution. This method realized a rapid com-bined determination of titanium and iron in ilmenite ore, which simplified the repeated sample fusion and shortened the analytical time. The relative standard deviations (RSD, n= 6) of total iron and TiO_2 were less than 0.30 % and 0.90%, respectively. This method was applied to the determinationof standard sample, and the results were consistent with the certified values, which could meet the re-quirements of analysis.