Water filtering time determination method

Abstract

The invention discloses a water filtering time determination method. Comprising the following steps: 1, folding sample filter paper into a paper cone, putting the paper cone into a glass funnel by a clamping assembly, and wetting the paper cone with water; 2, the wetted paper cone is suspended in a through hole in a fixing ring through an electric gripper, and water flows into a test tube from the through hole; 3, pouring 25ml of water with the temperature of 23 + / -2 DEG C into the initially filtered water to the position of the first sensor, automatically timing when the water level reaches the position of the second sensor, and automatically stopping timing when the water level reaches the position of the third sensor; and 4, extracting a test result from a display screen by using an external controller or manually, manually clicking a control button for drainage, opening the electric control valve, loosening the rubber tube, discharging water in the test tube out of the titration box, recovering the water level to the position of the first sensor, manually clicking a reset control button, and starting the next round of test. The device has the beneficial effect that the working efficiency is improved.

Description

[0001] The invention relates to the related technical field of chemical analysis filter paper, in particular to a method for measuring water filtration time. Background technique [0002] Many filtration operations are involved in the field of chemical composition analysis. Its purpose is to separate the insoluble matter in the solution from the solution to obtain a solution of insoluble matter and a fixed concentration or a solution without a fixed concentration. Among them, filtration refers to filter paper, funnel and receiving container involved in filtration. Filter paper is a kind of paper with good filtration performance. The paper is loose and has strong absorption performance for liquid. Analytical laboratories often use filter paper as a filter medium to separate solutions from solids. Filter paper can generally be divided into two types: qualitative and quantitative. In the application of analytical chemistry, when the inorganic compound is filtered to separate th...

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Problems solved by technology

[0003] Since there are particles in the sediment whose particle diameter is similar to or smaller than the pore size of the filter paper, the particles smaller than the pore size of the filter paper will pass through the filter, and the filtration speed will often decrease in the later stage of filtration, and sometimes the filter pores of the filter paper will be completely blocked.

Therefore, the technical defects in the above method are: 1. Preparation of funnel, funnel holder, folding and arranging filter paper, complicated operation; 2. Use of funnel and folding filter paper will increase pollution; 3. Filter paper clogging reduces analysis efficiency; 4. Precipitation caused by filtration loss

[0006] The above scheme has simple operation, little pollution, no clogging of filter paper and no precipitation through filtration. The disadvantage is that the method of measuring the quality of filter paper has not yet solved the problem of increasing working time and reducing work efficiency.

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