Measurement of sulfur substitutes why can not be measured by precipitation method

The precipitation method is a common chemical analysis method that can be used to determine the content of some substances. However, for the determination of sulfur compounds (sulfides), the precipitation method is not applicable. This is because sulfur compounds are usually insoluble in water, and the precipitation method requires that the substance to be measured be converted into a soluble precipitate, which is then subjected to a precipitation and filtration operation.

For sulfur substitutes, since they are insoluble in water, it is impossible to indirectly determine the content of sulfur substitutes through the concentration of sulfur ions in solution. Therefore, the conventional precipitation method cannot be used to directly determine the content of the sulfur substitute.

For the determination of the content of sulfur substitutes, the commonly used methods are gas chromatography, elemental analysis or X-ray fluorescence spectrometry. All of these methods are carried out by determining the specific properties or reactions of the molecules of the sulfur substitutes.

In short, the precipitation method can not be used to determine the content of sulfur substitutes, but need to choose other applicable analytical methods for accurate determination.