Patent ID: 11878298
Assignee: CHINA NATIONAL ELECTRIC APPARATUS RESEARCH INSTITUTE CO., LTD.
Field: Measurement (Instruments)
Classification: CPC B  G | IPC A  B  C  G

Claim 5:
6. The detection method of the detection device for online detection of atmospheric salt fog content according to claim 5, the detection method comprising:
Step S1: making an absorbance-concentration standard curve, preparing different concentrations of sodium chloride solutions as a plurality of standard sample solutions, respectively mixing uniformly each standard sample solution with a volume Vstandard with each liquid reagent with a volume Vreagent, so that chloride ions in the standard sample solutions fully react to obtain a plurality of mixed sample solutions, testing an absorbance of a mixed sample solution through a spectrophotometer to obtain the absorbance-concentration standard curve of the mixed sample solution;
Step S2: drawing a liquid absorbent with a volume V1 from the liquid absorbent storage tank into the sampling bottle;
Step S3: drawing an atmosphere with a volume Vq in an area to be detected into the sampling bottle, the atmosphere is absorbed by the liquid absorbent to form a first sampling solution;
Step S4: drawing the first sampling solution with a volume V2 from the sampling bottle into the reaction bottle, and drawing a liquid reagent from the liquid reagent storage tank into the reaction bottle, so that chloride ions in a sampling solution in the reaction bottle fully react, and then shading and standing still the sampling solution to form a first reaction solution;
Step S5: drawing all of the first reaction solution in the reaction bottle into a first cuvette through the sampling syringe, transferring the first cuvette from the reaction chamber to the analysis chamber through the conveyor, and testing an absorbance of the first reaction solution in the first cuvette by the spectrophotometer;
Step S6: calculating a chloride ion concentration in the first reaction solution according to the measured absorbance of the first reaction solution and the absorbance-concentration standard curve in Step S1;
Step S7: repeating Steps S3 to S6, sequentially obtaining a sampling solution N2−n and a reaction solution N2−n, and obtaining a chloride ion concentration in the reaction solution N2−n, n is a number of times of drawing the atmosphere with the volume Vq, that is, a number of tests of an absorbance of a reaction solution within one test cycle; and
Step S8: calculating salt fog content in an atmosphere according to the chloride ion concentration in the reaction solution N1−n together with a conversion formula between chloride ions and the atmospheric salt fog content, wherein
in Step S6 and Step S7, the obtained chloride ion concentration in the reaction solution N1−n is compared with a saturated concentration value, when the obtained chloride ion concentration is less than the saturated concentration value, a measured value is valid, and the valid measured value is recorded, and when the obtained chloride ion concentration is greater than or equal to the saturated concentration value, a measured value this time is invalid, and the measured value this time is discarded, one test cycle is completed, the device is cleaned, and the saturated concentration value is a chloride ion concentration of a liquid absorbent after saturated absorption of chloride ions.