Potassium hexacyanoruthenate(II) as an analytical reagent for iron.
Fe(III) undergoes a reaction with colourless Ru(CN)(4-)(6) to produce an intensely violet-blue complex that absorbs at 550 nm and obeys Beer's law over the iron concentration range 0.04-2 mug/ml in acidic medium. Some common cations and anions are tolerable at low concentrations. The procedure is applicable for determination of total iron in potable water. Destruction of organic matter is required for contaminated surface waters or soil samples.
Mehra
M C
MC
Department of Chemistry, Universit'e de Moncton, Moncton, N.B., Canada.
Landry
J C
JC