DETECTING STANNOUS IONS

摘要

A method of detecting stannous ions that includes providing a zincon-containing indicator having a colour, contacting the indicator with a sample, and detecting any resulting change in the colour of the indicator, wherein a change in the colour of the indicator from the colour to colourless indicates that stannous ions are present in the sample. The method is useful for the analysis of oral care compositions. Also provided is the use of zinc on as an indicator for detecting stannous ions.

主权项

1. A method of detecting stannous ions in a sample, which method comprises:
(i) providing an amount of an indicator comprising zincon or a salt thereof having a UV/visible absorbance spectrum; (ii) contacting the indicator with a sample such that if stannous ions are present in the sample, stannous ions react with the indicator; and (iii) detecting a change in the UV/visible absorbance spectrum of the indicator to determine whether stannous ions are present in the sample.