Effect of precipitate and complex formation on the determination of silver by atomic-absorption spectroscopy.
In the determination of silver, by atomic-absorption spectroscopy, the presence of small amounts of precipitating agents in the solution to be analysed can result in significant changes in the absorbance at 328.1 nm. The controlling factor is the physical form of the precipitated material. The presence of some complexing agents also causes variable absorption readings, and with ligands such as thiosulphate and cyanide ions the interference can be attributed to secondary reactions associated with the sparingly soluble compounds formed under specific conditions.
Lee
R F
RF
Chemistry Department, University of Newcastle, N.S.W. 2308. Australia.
Pickering
W F
WF