Application of artificial neural networks for the determination of proteins with CPA-pI by Rayleigh light scattering technique

作者：Dong Lijun; Chen Xingguo^*; Hu Zhide

来源：Journal of Luminescence, 2007, 124(1): 85-92.

DOI：10.1016/j.jlumin.2006.02.002

• Rayleigh light scattering
• artificial neural networks
• proteins
• CPA-pI

The determination of proteins with 2-(4-chloro-2-phosphonophenylazo)-7-(4-iodophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid (CPA-pl) by Rayleigh light scattering (RLS) was studied in this paper. The weak RLS of CPA-pl and BSA can be enhanced greatly by the addition of A1(3+) at the pH 5.6 and an enhanced RLS signal was produced at 365-385 nm. Based on the reaction of CPApl, Al3+ and proteins, a new quantitative determination method for proteins has been developed. The effect of three variables for the determination of proteins was optimized by means of artificial neural networks (ANNs) using extended delta-bar-delta (EDBD) algorithms with the optimal network structure of 3-5-1. This method is very sensitive (2.5-35.4 mu g/ml for bovine serum albumin (BSA)), rapid (< 2 min), simple (one step) and tolerance of most interfering substances. Six samples of protein in human serum were determined and the maximum relative error is no more than 2% and the recovery is between 95% and 105%.

• 出版日期2007-5
• 单位兰州大学