摘要
研究了应用溶剂浮选光度法的原理测定水中微量镍的方法。用 PAN作捕收剂与 Ni( )生成稳定、疏水的粉红色螯合物沉淀 ,当通入惰性气体时 ,疏水的螯合物吸附在气泡上 ,并随气泡上升到液面进入上层的有机相(异戊醇 )中与母液分离。镍络合物最大吸收位于 5 6 5 nm波长处 ,表观摩尔吸光系数 ε56 5=5 .4× 10 4 L· (m ol·cm ) - 1 ,镍浓度在 0～ 10μg· (10 m L ) - 1 范围内服从比尔定律。用于测定自来水样中的镍 。
A method for the solvent flotation photometric determination of nickel in water was proposed, Being a catching reagent ,PAN reacts with nickel(Ⅱ) to form a stable hydrophobic pink chelating complex sludge. Aerated the inert gases, the hydrophobic chelating complex was adsorbed at air bubble, get into the organic phase of isopentyl alcohol which was above the liquid level and then separated from mother liquor. The maximum wavelength of absorption was at 565nm,and the apparent molar absorbance was 5.4×10 4 L·(mol·cm) -1 . Beer′s law was obeyed in the range of 0~10 μg/10mL of nickel(Ⅱ).The proposed method has been applied to the determination of nickel in natural water samples with satisfactory results.
出处
《化工技术与开发》
CAS
2003年第4期31-33,共3页
Technology & Development of Chemical Industry
关键词
溶剂浮选
光度法
测定
水
镍
分析化学
solvent flotation
absorption photometry
determination
nickel
