Voltammetric parameters

Unit

Cd²⁺, Cu²⁺, Pb²⁺ and Zn²⁺

Volume of diluted sample

mL

1

Volume of ultra-pure water

mL

10

Electrolytes

KCl (1.5 mol∙L⁻¹) and C₂H₃NaO₂ (0.5 mol∙L⁻¹)

mL

2

Electrode of work

HMDE

Number of drops 4

4

Number of additions 2

2

Number of replications

3

Electrode of reference

Ag/AgCl (KCl 3 mol∙L⁻¹)

Auxiliary electrode

Platinum

Speed of shaking

rpm

2000

Purge time (ultra-pure N₂)

s

300

Additional purge time

s

10

Deposition potential

V

1.15

Deposition time

s

90

Equilibrium time

s

10

Pulse range

mV

0.05

Initial potential

V

−1.15

Final potential

mV

50

Tension degree

mV

6

Time of tension degree

s

0.1

Scanning rate

V/s

0.06

Zn²⁺

V

0.98

Cd²⁺

V

0.61

Pb²⁺

V

0.38

Cu²⁺

V

0.16