Simultaneous spectrophotometric determination of four metals by the kernel partial least squares method

✍ Scribed by Ling Gao; Shouxin Ren

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 106 KB
• Volume: 45
• Category: Article
• ISSN: 0169-7439
• DOI: 10.1016/s0169-7439(98)00091-4

✦ Synopsis

Ž

. Simultaneous determination of Mn, Zn, Co and Cd was studied by two methods, classical partial least squares PLS and Ž . Ž . Ž . kernel partial least squares KPLS , with 2-5-bromo-2-pyridylazo -5-diethylaminephenol 5-Br-PADAP and cetyl pyri-Ž . dinium bromide CPB . Two programs, SPGRPLS and SPGRKPLS, were designed to perform the calculations. Eight error functions were calculated for deducing the number of factors. Data reductions were performed using principal component analysis. The KPLS method was applied for the rapid determination from a data matrix with many wavelengths and fewer samples. Experimental results showed both methods to be successful even where there was severe overlap of spectra.