Abstract
A resonance light scattering (RLS) detection method for protein was developed, using a flow-injection system based on the enhancement of RLS signals from Biebrich scarlet (BS) by protein. The enhanced RLS intensities at 286.0 nm, in acidic aqueous medium, were proportional to the protein concentration over the range 0.005-18 microg/mL and 0.008-16 microg/mL for human serum albumin (HSA) and bovine serum albumin (BSA), respectively, with corresponding limits of detection (3sigma) of 5.00 ng/mL for HSA, and 7.80 ng/mL for BSA. The method was successfully applied to the quantification of total proteins in human serum samples.
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