An adjustable ratio dilution device and dilution method

Abstract

In order to mainly solve the problems of reagent dilution and dilution ratio adjustment in a chemical analysis instrument sample injection process, the invention discloses a dilution device able to adjust the ratio and a dilution method. The device comprises: a sample injection pump, an upper liquid level detector, a liquid storage ring, a lower liquid level detector, a two-position three-way mixing valve, a two-position three-way interception valve, a quantification pipe, a two-position three-way sampling valve, a liquid deficiency detector A, a liquid deficiency detector B, a to-be-diluted reagent, distilled water, a waste liquid bucket, a mixing vessel, and a controller. The dilution method includes: controlling the opening and closing states of the two-position three-way interception valve and the two-position three-way sampling valve, intercepting the reagent therebetween in the quantification pipe, then adding distilled water to make the total volume of the intercepted reagent and the added distilled water reach a set volume of the liquid storage ring, and conducting complete mixing, thus completing the dilution process. Specifically, the length and the inner diameter of the quantification pipe and the liquid storage ring can be adjusted to set different dilution multiples. The dilution process is completed in one time, and the volume is fixed after dilution. The dilution process automatically proceeds under the control of the controller. With the dilution device and the dilution method provided in the invention, the structure is simple, the cost is low, the dilution precision is high, and the ratio adjustment is convenient.

Description

technical field [0001] The invention relates to an adjustable ratio dilution device and a dilution method, which are suitable for automatic dilution of chemical analysis instrument reagents. Background technique [0002] A chemical analysis instrument for the determination of specific elements often uses a variety of chemical reagents to participate in chemical reactions. The amount and concentration of each reagent has standard requirements, and the upper and lower limits of the measurement range of the measured elements are also determined accordingly. It is more accurate, and exceeding the range will cause large errors, or even fail to measure; to measure a sample with a higher concentration, it is necessary to dilute the test sample to make it within the range, and then multiply the measurement result by the dilution factor to get As a result, different dilution factors can be selected to measure samples of different ranges, that is, range switching. Low-concentration s...

AI Technical Summary

Problems solved by technology

At present, the main dilution methods are as follows: method (1) perform relative dilution according to "parts", and mix the test sample and distilled water according to the proportion. Accurate, but the disadvantages are: repeated injection, long time, low efficiency, a large amount of distilled water for large-scale dilution, discarding the unused mixed solution, low utilization rate, this method is not suitable for large-scale dilution; method (2) is carried out according to the actual volume Absolute dilution, accurately measure the volume of the sample to be tested and distilled water, and then perform mixed dilution. The advantages are: single extraction to complete the measurement, accurate sampling, fast speed, high efficiency, and full use of dilution reagents. The disadvantages are: it affects the performance of the device and High process control requirements, complex structure and high cost

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