EDTA络合滴定法检测交联剂乙酰丙酮铝的铝含量及纯度
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摘要
采用乙二胺四乙酸二钠(EDTA)络合滴定法检测化工原料交联剂乙酰丙酮铝的铝含量及纯度。向乙酰丙酮铝样品中加入稀盐酸煮沸溶解,在样品溶液中加入定量且过量的EDTA溶液,加热煮沸促进铝离子与EDTA络合反应完全,二甲酚橙作指示剂,用锌标准溶液回滴过量的EDTA,测出铝含量,再根据铝含量计算乙酰丙酮铝的纯度。采用EDTA络合滴定法测定乙酰丙酮铝的铝含量和纯度,加标回收率在98.69%～100.30%之间,相对标准偏差≤0.5%(n=6),测定结果稳定可靠。
A method for the determination of aluminum content and purity of the crosslinker aluminum acetylacetonate with ethylene diamine tetraacetic acid(EDTA) complexometric titrimetry was reported in this paper. The sample powder was suspended in dilute hydrochloric acid and boiled to 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 purity of the sample were calculated accordingly. The recoveries of standard addition were found in a range of 98.69%-100.30%, and the relative standard deviations were less than 0.5%(n=6). Results show that the method can accurately estimate the aluminum content and purity of the crosslinker aluminum acetylacetonate.
A method for the determination of aluminum content and purity of the crosslinker aluminum acetylacetonate with ethylene diamine tetraacetic acid(EDTA) complexometric titrimetry was reported in this paper. The sample powder was suspended in dilute hydrochloric acid and boiled to 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 purity of the sample were calculated accordingly. The recoveries of standard addition were found in a range of 98.69%-100.30%, and the relative standard deviations were less than 0.5%(n=6). Results show that the method can accurately estimate the aluminum content and purity of the crosslinker aluminum acetylacetonate.
引文
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[12]黄仁彬.EDTA滴定法测定硅钡合金中铝和钙[J].冶金分析,2004,24(2):80-81.
[13]杨燕强,赵发宝.硅钙合金中铝的测定[J].大众标准化,2004,(9):40-41.
[14]覃志高.硫糖铝片中Al含量测定方法的改进[J].中国药品标准,2007,8(3):77-77.
[15]雷玉富,开小明.缓冲容量精确计算[J].广州化工,2016,(1):131-132.
[16]张拯,王克勤,李爱秀,等.赤泥盐酸浸出液中铝的EDTA络合滴定法研究[J].新技术新工艺,2011,(9):97-99.
[2]雷利珑,沈九凤,赵洁梅.铬天青S光度法测定硅铁中的铝[J].光谱实验室,2008,25(3):398-400.
[3]马增敏.强碱分离铬天青S光度法测定硅铁合金中的铝[J].化学分析计量,2011,20(s1):123-124.
[4]赵如琳,黄薇.挥发分离-铬天青S增敏分光光度法测定巴氏合金中铝[J].分析试验室,2015,34(6):698-701.
[5]于翔,马兵兵,苏中华.ICP-OES法测定铝-硼中间合金中硅铁铜锰镁铬镍锌钛锆钒镓硼[J].轻金属,2017,(9):49-52.
[6]郭庆斌,薛心禄.ICP-AES法测定硅铁中铝磷钙钛铬锰镍铜钡钒钴镁钼含量[J].青海环境,2005,15(4):181-183.
[7]白小叶,迟爱玲.EDTA络合滴定法测定硫酸铜废液中的铝[J].黄金,2014,(12):74-76.
[8]王爱国,郝鹏.EDTA络合-氟盐置换-硫酸铜滴定法测定铝铁中的铝含量[J].铁合金,2014,45(4).
[9]刘慧云,王金英,吴宏杰,等.EDTA络合滴定法测定推进剂中铝含量[J].火工品,2016,(2):57-60.
[10]张建珍,樊晓红,薛丽华.EDTA络合滴定法连续测定铁矿石中钙和镁[J].冶金分析,2011,31(8):74-78.
[11]王风清,董男平,崔丽梅,等.硝酸铅滴定法测定延期药中氧化铜[J].化学分析计量,2014,(3):79-81.
[12]黄仁彬.EDTA滴定法测定硅钡合金中铝和钙[J].冶金分析,2004,24(2):80-81.
[13]杨燕强,赵发宝.硅钙合金中铝的测定[J].大众标准化,2004,(9):40-41.
[14]覃志高.硫糖铝片中Al含量测定方法的改进[J].中国药品标准,2007,8(3):77-77.
[15]雷玉富,开小明.缓冲容量精确计算[J].广州化工,2016,(1):131-132.
[16]张拯,王克勤,李爱秀,等.赤泥盐酸浸出液中铝的EDTA络合滴定法研究[J].新技术新工艺,2011,(9):97-99.
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