In order to demonstrate the capability of Ti/TiO2 electrode
towards the catalytic oxidation of formaldehyde, we examined
this ability in amperometric determination of formaldehyde in
formalin. The determination of formaldehyde was carried out by
the standard addition method. The data obtained for analysis
formaldehyde by this method have been illustrated for several
times in Table 2. Also, in order to investigate the proposed
method the same sample was analyzed using iodometric titration
method in acidic solution as an official method [30]. The results
have been summarized in Table 2. As it can be seen, the results
obtained from the two methods are in good agreement and
confirm the reliability of the proposed method. A statistical test
(F-test) was used to confirm the precision of the proposed
method. As it can be seen, F-test results bear a noticeable
difference from the critical value (19.00) in four degrees of
freedom and 95% of confidence. Moreover, a statistical t-test