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. 2019 Dec 18;5(1):10–18. doi: 10.1021/acsomega.9b03013

Figure 1.

Figure 1

Mechanism of the biotin interference in a competitive (a) and sandwich IA (b). The excess biotin in the sample leads to an overestimation of analyte (positive error) in the case of a competitive IA and an underestimation (negative error) in a sandwich IA.