A method of detecting mercuric ions preparing nano silver probes and its application

The present invention discloses a method of detecting mercuric ions comprises sodium citrate by preparation and their use, preparation of nano silver probes - nanosilver solution was stirred at room temperature with stirring was added a solution of Tween 20, to give nanosilver probe. Application of nano silver probe comprising: a probe nanosilver mixed solution of sodium chloride, and then added to the mixture solution was measured at room temperature the reaction, the product solution by UV-visible absorption spectrum, the absorbance determining whether the changes in the test solution containing mercuric ions, the concentration of mercuric ions is calculated according to the linear regression equation. The method of preparing a probe of the present invention, nanosilver and application process is simple, mild conditions, low cost, high sensitivity detector probe nanosilver mercury ions, selectivity, high light absorption coefficient.