18
2 Comprehensive Electrochemistry of Tc …
Fig. 2.6 D.C. polarograms of the tetramethylammonium salts of 10 −3 M MnO
−
4 , TcO
−
4 and ReO
−
4
in water and acetonitrile. Supporting electrolyte 0.05 M (CH 3 ) 4 NCIO 4 , drop time 0.5 s, flow rate
of mercury 0.923 mg s −1 , temperature 25 °C (reprinted with permission from Astheimer and
Schwochau (1976). Copyright 1976 Elsevier)
Astheimer and Schwochau (1976) have shown that reduction of MO
−
4 (M: Mn,
Tc, Re) in various nonaqueous solutions may lead to the formation of ionic forms of
the elements with the same oxidation state and almost the same, at least for Tc and
Re, transport properties. In aqueous media, they obtained Tc(V), Re(IV) and Mn(II)
species. Respective polarograms for discussed Mn, Tc and Re systems are presented
in Fig. 2.6. The curves recorded for technetium in aqueous solutions reveal a poorly
2 Comprehensive Electrochemistry of Tc …
Fig. 2.6 D.C. polarograms of the tetramethylammonium salts of 10 −3 M MnO
−
4 , TcO
−
4 and ReO
−
4
in water and acetonitrile. Supporting electrolyte 0.05 M (CH 3 ) 4 NCIO 4 , drop time 0.5 s, flow rate
of mercury 0.923 mg s −1 , temperature 25 °C (reprinted with permission from Astheimer and
Schwochau (1976). Copyright 1976 Elsevier)
Astheimer and Schwochau (1976) have shown that reduction of MO
−
4 (M: Mn,
Tc, Re) in various nonaqueous solutions may lead to the formation of ionic forms of
the elements with the same oxidation state and almost the same, at least for Tc and
Re, transport properties. In aqueous media, they obtained Tc(V), Re(IV) and Mn(II)
species. Respective polarograms for discussed Mn, Tc and Re systems are presented
in Fig. 2.6. The curves recorded for technetium in aqueous solutions reveal a poorly