Table 3 Nikolskii selectivity coefficients Kij for the four anion ISFETs with respect to four anions.

From: Selective ion sensing with high resolution large area graphene field effect transistor arrays

 NO\({}_{3}^{-}\)SO\({}_{4}^{2-}\)HPO\({}_{4}^{2-}\)Cl
\({\rm{NO}}_{3}^{-}\) ISFET11.47 × 10−26.11 × 10−31.98 × 10−2
\({\rm{SO}}_{4}^{2-}\) ISFET8.85 × 10318.27 × 10−33.75 × 10−1
\({\rm{HPO}}_{4}^{2-}\) ISFET1.66 × 1001.09 × 10−412.10 × 10−3
Cl ISFET1.51 × 10−31.38 × 10−71.28 × 1021