![Sample our Economics, Finance,Business & Industry journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5931/TOC-Subject-Sample-2021-Economics-Finance-Business-Industry.jpg"})
ABSTRACT
The aim of the present work is to study the influence of the sequential or competitive adsorption of anti-HSA (Human Serum Albumin) IgG and RSA (Rabbit Serum Albumin) onto a negatively charged polystyrene latex on the colloidal stability of the immunoiatex (IgG-RSA/latex). Anionic (1-2) latex was prepared by surfactant free emulsion polymerization. Adsorption of IgG and RSA on the latex 1-2 was performed at low ionic strength and different pHs. Sequential and competitive adsorption of a-HSA IgG and RSA were performed
Colloidal stability of immunolatex was improved by RSA adsorption, especially in the competitive adsorption. In this last case, the immunological agglutination reactions of physically adsorbed IgG molecules onto anionic particles have been investigated by means of optical absorbance measurements. These measurements have been conducted under different experimental conditions to determine the most influential factors. Surface IgG and BSA densities, particle concentration in the reaction medium, and polyethylene glycol concentration are some of these factors. An amount of HSA lesser than 60 ng/ml has been possible to detect using this particle enhanced optical immunoassay.