A kind of Raman detection kit and Raman detection method of organophosphorus
A detection kit and detection method technology, applied in Raman scattering, measurement device, material excitation analysis, etc., can solve the problems of low detection sensitivity, long time, low accuracy, etc., achieve simple components, improve detection sensitivity, low cost effect
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Embodiment 1
[0039] In this example, the preparation of the Raman detection kit for organophosphorus and the Raman detection of the analytes were carried out at room temperature.
[0040] Prepare the sample to be tested: prepare a solution with a concentration of 1000mg / LDMMP as the sample to be tested.
[0041] For the preparation of Au sol, add chloroauric acid solution into 50mL water, heat to boil, then add sodium citrate solution, continue heating for 30min, and cool to room temperature, wherein the molar ratio of chloroauric acid to sodium citrate is (4-6): 3. Au sol with a particle size of 30-100nm is obtained.
[0042] For the preparation of core-shell nanoparticle sol, disperse the obtained Au sol in 50mL ultrapure water, add about 3mL of sodium citrate with a mass fraction of 1% and ascorbic acid with a mass fraction of 1%, mix well and then add 10mL of concentration dropwise 20mmol / L silver nitrate solution, stirred for a certain period of time, centrifuged, washed, and concent...
Embodiment 2
[0047]In this example, the preparation of the Raman detection kit for organophosphorus and the Raman detection of the analytes were carried out at room temperature.
[0048] Prepare the sample to be tested: Prepare the mother solution with a concentration of 1000mg / LDMMP, and dilute them respectively to obtain DMMP standard solutions with concentrations of 100mg / L, 10mg / L, 1mg / L, 100μg / L, 50μg / L and 10μg / L as the samples to be tested.
[0049] For the preparation of Au sol, take 1% chloroauric acid solution and add it to 50mL water, heat to boil, then add 2mL sodium citrate solution with a concentration of 1%, continue heating for 30min, and cool to room temperature to obtain a particle size of 30 - 100nm Au sol.
[0050] For the preparation of core-shell nanoparticle sol, disperse the obtained Au sol in 50mL ultrapure water, add about 3mL of sodium citrate with a mass fraction of 1% and ascorbic acid with a mass fraction of 1%, mix well and then add 10mL of concentration drop...
Embodiment 3
[0055] Prepare the sample to be tested: prepare a DMMP mother solution with a concentration of 1000 mg / L, and dilute it to obtain a DMMP standard solution with a concentration of 100 mg / L as the sample to be tested.
[0056] In Example 3, the same process conditions as in Example 2 of the present invention were used to detect the 100 mg / L DMMP sample to be tested. The difference was that Example 3 was carried out at 10°C and 50°C respectively.
[0057] Figure 5 is the Raman detection spectrum of the solution to be tested under different temperature conditions. The results show that the organophosphorus Raman detection kit and the Raman detection method of the present invention can obtain relatively stable and strong signals in the face of large fluctuations in the temperature of the test environment.
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