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. 2014 Jul 22;14(7):13186–13209. doi: 10.3390/s140713186

Table 3.

The pH effect on urea biosensor response at the wavelength of 650 nm (n = 3).

pH The Correlation Coefficient, R2 Sensitivity Linear Range (mM)
6 0.7896 0.2639 50–500
7 0.9609 0.3932 50–500
8 0.8637 0.2410 50–500