Method for the detection and removal of substitution labile...

Details Method for the detection and removal of substitution labile... Method for the detection and removal of substitution labile...

G - Physics

01

N

150/19, 362/47

G01N 31/02 (2006.01) B01D 21/01 (2006.01) G01N 33/20 (2006.01)

Patent

CA 1204048

ABSTRACT OF THE INVENTION A method of detecting substitution labile transition metal ions from an aqueous solution. The method comprising the step of adding an effective amount of an ionizable 2- pyridinethiol-1-oxide salt. The presence of said salt anion being compatible with the presence of or subsequent addi- tion of chelating or sequestering agents having a higher equilibrium content for the ion to be complexed than the salt anion whereby the presence of the ion is confirmed by a color change and the formation of a precipitate. The metal-pyridinethiol complex thus precipitated can be removed from solution by conventional unit operations, for example by filtration or centrifuging.

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