Multi-channel full-automatic termovap sample concentrator and concentrated solution detection and control method

Abstract

A multi-channel full-automatic termovap sample concentrator and a concentrated solution detection and control method belong to the field of laboratory instruments. A plurality of water bath tanks arearranged, the plurality of water bath tanks are uniformly arranged at the periphery of a turntable; test tube racks are arranged on the water bath tanks; purging support frames are arranged on the test tube racks; the used water and gas are heated by a heating part and are respectively conveyed to water distribution pipes and purging needles; photoelectric detection devices for detecting the liquid levels of sample solutions in test tubes are arranged beside the water bath tanks; the inner sides of the water bath tanks are communicated with auxiliary water tanks; the test tube racks and the auxiliary water tanks are respectively connected with respective lifting devices; and the lifting devices, the sample liquid level photoelectric detection devices and a cyclic pump are electrically connected with a controller. By means of the device and method, the solution evaporation speed can be increased, the purging efficiency can be improved, and therefore the experiment precision under the same condition can be obtained, errors can be reduced, and the recovery rate and the analysis precision of samples can be improved.

Description

technical field [0001] The invention relates to a nitrogen blowing instrument and a concentrated liquid detection and control method, in particular to a multi-channel automatic nitrogen blowing instrument and a concentrated liquid detection and control method, belonging to the field of laboratory instruments. Background technique [0002] Nitrogen blowing instrument is the abbreviation of nitrogen blowing dry instrument (Termovap Sample Concentrator), also known as: nitrogen concentration device, nitrogen purging instrument, nitrogen blowing concentrator, sample concentrator, also known as nitrogen blowing instrument, concentrator. [0003] Usually, nitrogen or air is blown into the surface of the heated sample to concentrate the sample. It has the characteristics of time saving, convenient operation and easy control, and the concentrated result can be obtained quickly. [0004] It is widely used in the quality inspection of agricultural and livestock products, the analysis ...

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Problems solved by technology

[0015] Aiming at the problem that the distance between the purge needle and the sample solution in the test tube is difficult to accurately control when purging the current nitrogen blowing instrument, resulting in different evaporation rates of the solution, and the problem that the experimental goal and reliability cannot be achieved under the conditions of strictly complying with the experimental requirements, the present invention provides a A multi-channel automatic nitrogen blowing instrument is a multi-channel automatic nitrogen blowing instrument and a concentrated solution detection and control method, the purpose of which is to purge the liquid level by detecting the solution in the test tube, and control the distance between the sample liquid and the purge needle by raising and lowering the height of the test tube Height, by precisely heating the liquid and gas in the water bath, the test process can be more strictly followed the experimental requirements, and can further speed up the evaporation rate of the solution and improve the purging efficiency, so that the experimental accuracy under the same conditions can be obtained, the error and uncertainty can be reduced, and the accuracy of the test can be improved. Sample recovery and analytical precision and reliability throughout the experimental process

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