CoO-NiO/Al_2O_3催化剂中Ni含量测定方法  

Determination of Nickel in CoO-NiO/ Al_2O_3 Catalyst

作　　者：于锡闻[1] 

机构地区：[1]东华大学化学化工与生物工程学院,上海201600

出　　处：《广东化工》2009年第7期214-214,234,235,共3页Guangdong Chemical Industry

摘　　要：应用分光光度法测定了CoO-NiO/Al2O3催化剂中Ni含量,试样溶于硫磷混酸中,溶液中的二价镍离子在碱性溶液中有氧化剂(过硫酸铵)存在时与丁二酮肟生成可溶性红色络合物。用3cm比色皿,在波长460nm处测定,方法最小检出限质量分数为0.025%。考核了方法的精密度和准确度,样品测定8次,求得测定结果的相对标准偏差为0.86%,标准加入回收率在95.7%～102.3%。Spcctrophotometry was applied to the determination of nickel in CoO-NiO/Al2O3 catalyst. The sample was dissolved in H3PO4-H2SO4 solution. The Ni^2＋ was formed to red complex with diacctyldioxime in alkaline sohition（ammonium persulfate）. Mcasurement of absorbance was made at the wavelength of 460 nm with 3 cm absorption cell. The minimum detection limit of the method was 0.025 %. The proposed method was used in analyzing sample with 8 dctcrminations. The value of RSD was 0.86 %. The values of recovery found were in the range of 95.7 % to 102.3 %.

关 键 词：分光光度法 硫磷混酸 丁二酮肟 催化剂 镍 

分 类 号：TB[一般工业技术]