论文部分内容阅读
本法将硫酸亚铁铵容量法(高氯酸作氧化剂)摘定锰后的溶液,调整酸度,加入次甲基蓝增大二氯化锡还原三价铁时的变色差度,最后用重铬酸钾标液滴定。连测后,锰仍用原方法,铁的准确性也仍然可靠,比单测的工作量和成本都明显降低。 一、分析步骤 1.锰的分析手续 按硫酸亚铁铵容量法(高氯酸作氧化剂,用0.5％二苯胺磺酸钠2滴作滴定时指示剂) 2.铁的分析手续 <1> 滴定锰的硫酸亚铁铵溶液与滴定铁的重铬酸钾溶液的比值K:
This law ferrous ammonium sulfate volumetric method (perchloric acid as oxidant) after digestion of manganese solution, adjust the acidity, adding methionine to increase the tin dichloride reduction of ferric iron when the color difference, and finally with heavy Potassium chromate standard titration. Even with the test, the original method of manganese is still used, the accuracy of iron is still reliable, significantly reduced than the workload and cost of a single test. First, the analysis steps 1. Manganese analysis procedures ferrous ammonium sulfate volumetric method (perchloric acid as an oxidizing agent, with 0.5% sodium diphenylamine sulfonate 2 drops for titration indicator) 2. Analysis of iron <1> titration Ratio of manganese ammonium ferrous sulfate solution to titrimetric potassium dichromate solution K: