Automatic weighted titration type micro-metering method and device

Abstract

The invention discloses an automatic weighted titration type micro-metering method and device. A A-type titration pipe assembly, a B-type titration pipe assembly and a C-type titration pipe assembly, which are triangularly arranged, are arranged between a liquid storage tank and a bracket, the A-type titration pipe assembly comprises titration pipes with range weights respectively being 1 microliter, 2 microliters and 5 microliters, the B-type titration pipe assembly comprises titration pipes with range weights respectively being 10 microliters, 20 microliters and 50 microliters, the C-type titration pipe assembly comprises titration pipes with range weights respectively being 100 microliters, 200 microliters and 500 microliters; an electronic control valve connected with a control system is arranged on each titration pipe, the control system is used for completing the metering by calling at least electromagnetic valves with at least titration time, sequentially enabling the titration pipes to execute the titration times of corresponding electronic control valves according to the range weights in a descending order, and allocating different ranges of the titration pipes according to different weights by adopting a linear combination manner; the titration metering decomposition is completed by titration pipes with different weights, thus the accuracy of replenishing liquid is improved, and the high-precision micro-metering is completed.

Description

technical field [0001] The invention relates to the field of micrometering, in particular to a micrometering device and a micrometering method for high-precision titration analysis. Background technique [0002] Micrometering method plays an important role in the metering of fluids such as liquids and gases, especially how to achieve accurate flow measurement is the key to fluid quantification technology. The methods currently applied to liquid micrometering are: (1) thermal flowmeter, that is, the principle of heat conduction distribution effect of changing the temperature distribution of the tube wall of the measuring tube by using the flowing fluid to transfer heat; (2) tubular differential pressure flowmeter, according to A corresponding relationship between the differential pressure value at both ends of the flowmeter and the flow rate is used to solve the problem of micro-flow measurement; (3) Capillary liquid micro-flowmeter, which accurately measures the liquid flow ...

AI Technical Summary

Problems solved by technology

There are some deficiencies in the above micrometers: the metering speed of the liquid is contradictory to the metering accuracy. If the diameter of the liquid conduit is increased, although the metering speed can be increased, the metering accuracy will be reduced; if the accuracy of the liquid metering is considered, ensure that If the accuracy is high, it is necessary to reduce the diameter of the liquid conduit, which will result in a decrease in the metering speed.

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