Abstract
AbstractIn pH 7.2 Na2HPO4‐NaH2PO4 buffer solution and in the presence of PEG‐6000, goat‐anti‐human factor B (GABF) was combined with human factor B (BF) specifically, and aggregated to form immune complex particles that exhibited a resonance scattering (RS) peak at 400 nm. The laser scattering indicated that the average diameter of immune complex particles was 1320 nm. BF in the concentration range of 0.04 to 9.60 µg/mL was proportional to the resonance scattering intensity at 400 nm. Its regression equation was ΔI=33.61C+ 1.4, with a correlation coefficient of 0.9969, and a detection limit of 0.01 µg/mL BF. This label‐free resonance scattering spectral (RSS) method has been applied to the determination of BF in serum samples, and the results were in agreement with that of the immunoturbity.
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