| 摘要 |
<p>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 2pyridinethiol-1-oxide salt. The presence of said salt anion being compatible with the presence of or subsequent addition 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.</p> |
