Typical limits of detection for voltammetry

Antimony
SbIII/SbV
200 ppt

Mercury Hg
100 ppt
Arsenic
AsIII/AsV
100 ppt
  Nickel
Ni 50 ppt
Bismuth
Bi
500 ppt
  Platinum Pt
0.1 ppt
Lead
Pb 50 ppt
  Rhodium Rh 0.1 ppt
Cadmium
Cd 50 ppt
  Selenium SeIV/SeVI 300 ppt
Chromium
CrIII/CrVI 25 ppt
  Thallium  Tl 50 ppt
Cobalt Co 50 ppt
  Uranium  U 25 ppt
Copper Cu
50 ppt
  Tungsten  W 200 ppt
Iron FeII/FeIII
50 ppt
  Zinc  Zn 50 ppt
Molybdenum Mo 50 ppt