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(A) Dependence of Red channel intensity on nitrite concentration. The concentrations are 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0, 1.5, 2.0, and 3.0 mM. (B) The linear fit plot of Red channel intensity and glucose from 0.05 mM to 0.7 mM.
