Method for detecting content of silver ions in silver-ammonia ion bacteriostatic hand sanitizer

The invention provides a method for detecting the content of silver ions in a silver-ammonia ion bacteriostatic hand sanitizer, which comprises the following steps: step S101, taking a proper amount of sample, adding water, and uniformly stirring; step S102, adding excessive sodium hydroxide and distilling, and absorbing ammonia gas generated by distillation with quantitative sulfuric acid; step S103, putting a magnetic stirrer into the sulfuric acid solution absorbing the ammonia gas, putting the sulfuric acid solution on the magnetic stirrer, starting an automatic potentiometric titrator, titrating with a sodium hydroxide standard solution, judging that a titration end point is reached when the pH value reaches a preset value, and recording the consumed sodium hydroxide amount V1; step S104, carrying out a blank experiment, taking quantitative sulfuric acid, titrating with a sodium hydroxide standard solution, and recording the sodium hydroxide amount V0 consumed by a blank reagent; and S105, calculating th