Patent ID: 6828158
Filing Date: 2004-12-07
Classification: G01N,Y10S

Abstract:
A reagent for an agglutination assay for determining an analyte in a sample, said reagent comprising a mixture of microparticles, said mixture comprising first microparticles having a mean diameter from 30 to 600 nm and a refractive index, wherein said first microparticles are coated with a first binding partner for said analyte, and second microparticles having a mean diameter from 30 to 600 nm and a refractive index, wherein said second microparticles are coated with a second binding partner for said analyte, said first microparticles having stronger light scattering properties than said second microparticles, and said first binding partner having a higher reactivity for said analyte than said second binding partner, said microparticles being capable of causing light scattering at wavelengths between 300 and 1200 nm.