Differential pulse voltammetric determination of P(V) following adsorptive accumulation of alpha-[PMo(12)O(40)](3-) on a polypyrrole-modified glassy carbon electrode.
On the basis of the formation and pre-concentration of an alpha-Keggin-type [PMo(12)O(40)](3-) complex, a novel voltammetric method was developed for the determination of trace levels of P(V). The alpha-[PMo(12)O(40)](3-) complex was formed by heating a 5x10(-4) M Mo(VI)-0.2 M HCl-40% (v/v) CH(3)CN system containing a trace amount of P(V) at 70 degrees C for 30 min. During the electrochemical polymerization of pyrrole in the alpha-[PMo(12)O(40)](3-) solution, the alpha-[PMo(12)O(40)](3-) complex was accumulated into the polypyrrole film on a glassy carbon electrode. The differential pulse voltammetric peak current due to the alpha-[PMo(12)O(40)](3-) complex incorporated in the polypyrrole film was linearly dependent on the P(V) concentration in the range of 5x10(-9)-5x10(-7) M; a detection limit of 2x10(-9) M was achieved.
Electrochemical behaviour of polyaniline films doped with heteropolyanions of Keggin structure
Abstract Electrically conducting polyaniline (PANI) doped with heteropolyanions (HPA) of Keggin structure was synthesised by electrochemical polymerisation. Cyclic voltammetry showed reversible redox systems from the polymer itself and from the immobilised HPA. The electrocatalytic investigations of PANI electrode modified by HPa in reaction of electroreduction of bromate have been performed.
REJOINDER TO BLOCK'S DEFENSE OF EVICTIONISM
I AM THANKFUL TO WALTER BLOCK (2010) for his comprehensive and perspicacious engagement with my critical remarks regarding his theory of evictionism (Wisniewski 2010). I also appreciate his kind words about what he sees as the merits and strong points of my argumentation. However, as one could easily surmise from my decision to write this rejoinder, I found his defense of evictionism unconvincing, though certainly informative and thought-provoking. Without further ado, let me now proceed to explaining why.