Detection reagent for heavy metal ions and synthesis method thereof

TLDR: In this paper, a detection reagent for heavy metal ions and a synthesis method of the reagent is presented. But the synthesis process is simple, production is easy to realize, raw materials are easy to obtain, production cost is low, detection signals are stabile and have good reproducibility.

Abstract: The invention provides a detection reagent for heavy metal ions and a synthesis method thereof, and belongs to the technical field of organic synthesis. The synthesis method of the reagent comprises the following steps: (1) dissolving o-phenylenediamine in a hydrochloric acid solution; (2) adding ethylenediaminetetraacetic acid and a hydrochloric acid solution into a three necked flask, heating and dissolving, and controlling reaction temperature; (3) slowly adding dropwise the solution obtained in the step (1) into the solution obtained in the step (2), and after the solution obtained in the step (1) is completely added dropwise into the solution obtained in the step (2), continuing reflux for reaction; and (4) naturally cooling the reaction solution at room temperature, filtering, cooling filtrate for 8 to 12h for precipitation of a colorless crystal, filtering by suction, washing a filtering cake with anhydrous ethanol and drying to obtain the target detection reagent. The reagent and lead, cadmium and copper ions can form stable complexes with strong absorption in an ultraviolet region, the stable complexes can be detected by an ultraviolet detector of a liquid chromatography, the synthesis process is simple, production is easy to realize, raw materials are easy to obtain, production cost is low, detection signals are stabile and have good reproducibility, and the detection reagent is worthy of wide application and promotion.