from 1.0 to 220.0 g L−1. The linear regression equation of Cd(II)
is ip = 0.95C + 7.16 (ip: A, C: g L−1) with a correlation coefficient
of 0.998, and the detection limit is 0.15 g L−1. We have compared
this film electrode with some other modified electrodes and the
results are listed in Table 1. It can be seen from Table 1 that the
Bi–SbFE has the highest sensitivity among all the electrodes except
Nafion–graphene/GCE (Nafion–Gr/GCE) [24].