rare earth elements, and transition metals. In addition to sodium salts, there are also ammonium salts and various salts such as iron, magnesium, calcium, copper, manganese, zinc, cobalt, and aluminum, which have different uses.
摘 要:硅铁合金是炼钢工艺中的脱氧剂及合金剂,其中铝含量是比较重要的质量指标。试验提出以硝酸、氢氟酸溶解试样,氢氧化钠沉淀铁、锰、钛等元素使之与铝分离,在微酸性中使铝与EDTA形成络合物,以PAN为指示剂,用硫酸铜标准溶液滴定过量的EDTA。通过精密度实验,经数理统计后确定了EDTA滴定法...
GBT6987.82001铝及铝合金化学分析方法EDTA滴定法测定锌量.pdf ICS 77-120.10 H 12 G昌 中华人民共和国国家标准 Gs/T6987.1一6987.32-2001 铝及铝合金化学分析方法 Methodsforchemicalanalysisof aluminum andaluminum alloys 2001一07门0发布 2001门2一01实施 中华 人 民共 和 国 发布 国家 质量监督 检验 检疫...
quickandaccuratedeterminationofaluminiuminthecryoliteandalu2miniumfluoridewasachievedbythismethod.Therecoveriesafteradditionofstan2dardare98~103%and98~101%respectively.Therelativestandarddeviationare0.61%and0.41%(n=11)respectively.Keywords:cryolite;aluminumfluoride;EDTAtitrimetry;alumium些报道3~5关于冰晶石及氟化...
completely dissolve the powder An excess EDTA solution was added to the sample solution and boiled in order to complete the complexation with aluminum ions.With xylenol orange as the indicator;the excess of EDTA was dropped back with a standard solution of Zn2+,and the aluminum content and ...
It is suitable for the determination of cadmium with mass fraction of 3.00%–12.00% in aluminum and aluminum alloy.Keyword cadmium; aluminum and aluminum alloy; complexometric titration; alkali separation镉元素是提高铝合金时效硬化特性的主要元素,可以大幅度改善铝合金的屈服硬度,降低延伸率,对合金组织和...
表1 铁矿石样品中铝、铅、锌含量的分析结果(n=5)Table 1 Analytical results of aluminum,lead and zinc in iron ore samples样品Sample认定值(w/%) 测定值(w/%) 平均值(w/%)Averag相对标准偏差(%)Certified Al2O3 e Pb Zn Found Al2O3Pb Zn Al2O3Pb Zn RSD Al2O3Pb Zn 4.27 0.114 0.225 4.41...
关键词:EDTA滴定法;三氧化二铝;高铁质铝土矿;氟化钾;煮沸时间中图分类号:O655.2;O614.31;P578.496 文献标识码:BDeterminationofAluminuminBauxitesbyFluorateReplacementEDTATitrimetryMENGYadong,SUNLuoxin,FUXiaoqiang,YANGGuisong,SHENKaihong(LaboratoryofGeologyandMineralExplorationofHenanProvince,Zhengzhou450051,China)...
Standard Test Method for Determination of Aluminum in Iron Ores and Related Materials by EDTA Complexometric Titrimetry 首页 标准 ASTM E738-20 预览ASTM E738-20前三页 标准号 ASTM E738-20 2020年 发布单位 美国材料与试验协会 当前最新 ASTM E738-20 ...
茂金属配合物Using a certain ratio of perchloric acid to nitric acid to digest samples , xylenol orange was used as an Bindicator , EDTA complexometric titration was introduced to measure zirconium content of metallocene complexes in optimal acidity and temperature.The results showed that aluminum , ...