Blending device used in direct titration detection method

Abstract

The invention discloses a blending device used in a direct titration detection method. The blending device comprises a leading-in pole and at least a pipe body, wherein the pipe bodies are fixed at the lower end of the leading-in pole and are provided with inner cavities; openings are formed at the two ends of each pipe body and are communicated with the inner cavity; during detection, the pipe bodies are soaked in reaction liquid. The blending device has the advantages that since the pipe bodies with the inner cavities and the openings are soaked in the reaction liquid, and when boiling, the reaction liquid can quickly generate uniform bubbles via the pipe bodies so as to be quickly mixed with the titrating liquid uniformly, thus improving the accuracy and stability of the detection results.

Description

technical field [0001] The invention relates to detection equipment, in particular to a mixing device for direct titration detection method. Background technique [0002] At present, the direct titration method is used to detect the total sugar and reducing sugar in food, and is the preferred method for referee inspection. The direct titration method is to titrate under boiling conditions. The principle is that reducing sugar and copper hydroxide undergo redox reactions under boiling conditions to form cuprous oxide precipitates. At the end of the titration, excess reducing sugars and the indicator methylene blue undergo redox reactions. The color of the titration end point is that the methylene blue changes from blue to colorless, and the titration system solution changes from blue to brick red or deep red. [0003] The detection conditions of the direct titration method are relatively harsh, and the titration rate is required to be 1 drop every 2 seconds, that is, 0.025 m...

AI Technical Summary

Problems solved by technology

Since the mixing process of the reaction solution depends entirely on the bubbles generated by the boiling of the reaction system and the bubbles generated by the zeolite, the reaction solution cannot be made uniform, so that the titrant cannot diffuse quickly and uniformly in the reaction solution, that is, the reaction solution and the titration solution cannot be quickly mixed. Uniformity, which leads to the titration reaction can not be completed instantly, 5-10 seconds reaction liquid mixing time, it will cause titration parallel operation can not judge the titration end point under the same conditions, so that the parallelism of the titration results is poor

Due to the above reasons, the operation of the staff who detect the total sugar will be greatly affected in the actual work, and the accuracy and stability of the results will have certain deviations.

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