CoO—NiO／Al2O3催化剂中Ni含量测定方法

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85.7%-102.3%。

Determination of Nickel in CoO-NiO/ Al_2O_3 Catalyst

Spectrophotometry was applied to the determination of nickel in CoO-NiO/ Al2O3 catalyst. The sample was dissolved in H3PO4- H2SO4 solution. The Ni2+ was formed to red complex with diacetyldioxime in alkaline solution(ammonium persulfate). Measurement 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 determinations. The value of RSD was 0.86 %. The values of recovery foun...