【摘要】 运用卡尔曼滤波递推法,以2-(5-溴-2-吡啶偶氮)—5-二乙氨基苯酚(5-Br-PADAP)为显色剂,建立了同时测定锰、铁、铜、锌、镉析相光度法.在pH9.0硼酸-氢氧化钠介质中,胶束溶液在95℃加热1h,配合物被Triton X-100相完全富集,最大吸收峰分别为锰566nm、铁556nm、铜560nm、锌562nm、镉557nm,工作曲线范围除镉为0～8μg/5ml外,其余均为0～10μg/5ml.应用于大米中锰铁铜锌镉的同时测定,结果满意.更多还原

【Abstract】 A phase separation spectrophotometric method based on kalman filter was described for si-multanous determination of Mn Fe Cu Zn and Cd with 5-Br-PADAP in the presence of Triton X-100. In a medium of H3BO3-NaOH buffer of pH 9. 0, the complexes can be enriched in Triton X-100 phase when heating at 95℃for 1h in a boiling water both. The maximum absorptions of the complexes lie at 566nm (Mn) 556nm(Fe) 560nm(Cu) 562nm(Zn) and 557nm(Cd). Bee’s laws are obeyed in the range of 0 to 10 μg/5ml for Mn Fe Cu Zn and Cd is 0 to 8 μg/5ml. The proposed method has been applied to the determination of Mn Fe Cu Zn and Cd in race with satisfactory results.更多还原