Detection method using colorimetric analysis
A detection method using colorimetric analysis of the present invention includes: providing a first solution in which two materials selected from metal nanoparticles, an oxidizing agent, and chloride ions are mixed; providing a second solution including one other material that is not included in the first solution among the metal nanoparticles, the oxidizing agent, and the chloride ions; preparing a mixture solution by mixing the first solution and the second solution; and testing and measuring a color change of the mixture solution.
1. A detection method using colorimetric analysis, comprising: providing a first solution of metal nanoparticles and an oxidizing agent; providing a second solution including chloride ions; mixing the first solution and the second solution into a mixture solution; testing and measuring a red shift and an intensity decrease of ultraviolet ray-visible ray absorption peak of the mixture solution as compared to the first solution to determine a concentration of the chloride ions, wherein the red shift occurs by a leaching of the metal nanoparticles.
2. The detection method of claim 1 , wherein
the first solution is provided as a detection solution and
the second solution is provided as a detection target
wherein the detection solution is mixed with the detection target to test for and measure a red shift and an intensity decrease of ultraviolet ray-visible ray absorption peak to determine a concentration of the chloride ions of the detection target.
3. The detection method of claim 2 , wherein
the detection target includes at least one among sea water, stream water, pond water, tap water, and deionized water including the chloride ions.
4. The detection method of claim 2 , wherein the detection target including the chloride ions is hydrochloric acid.
5. The detection method of claim 1 , wherein the diameter of the metal nanoparticles is in a range of 10 to 100 nm.
6. The detection method of claim 5 , wherein the diameter of the metal nanoparticles is in a range of 20 to 30 nm.
7. The detection method of claim 1 , wherein the metal nanoparticles include at least one of gold (Au) nanoparticles and silver (Ag) nanoparticles.
8. The detection method of claim 1 , wherein the oxidizing agent includes at least one of nitric acid (HNO 3 ) and hydrogen peroxide (H 2 O 2 ).
9. The detection method of claim 2 wherein
in the testing and measuring of the red shift and an intensity decrease of an ultraviolet ray-visible ray absorption peak of the mixture solution,
after the detection solution and the detection target are mixed and left for a predetermined time, the red shift and an intensity decrease of the ultraviolet ray-visible ray absorption peak is tested and measured by comparing with the detection target before the mixing.