A nitrogen blowing instrument with a removable shelf

Abstract

The invention provides a nitrogen blowing concentrator with a removable holder and belongs to the chemical analytical device field. A rotatable n-shaped framework structure, an air feed air path capable of rotating at will, an air needle dial arranged on an air needle frame support rotatably and a plurality of blowing needles on the air needle dial form a multi-needle nitrogen blowing element which can go up and down at will along the air needle frame support and can rotate and move horizontally at will with a support rod as an axis. Through the rotatable n-shaped framework structure, a shaft coupling and a test tube rack arranged in a bath separably, the function is achieved that the test tube rack can be taken out as a whole from the bath. Through an air needle frame shaft sleeve, the air needle frame support and the shaft coupling connected with the test tube rack, linkage or synchronous rotation movement of a blowing needle rack and the test tube rack is achieved. The multi-needle nitrogen blowing element and the test tube rack structure which can be taken out as a whole from the bath are employed, the simultaneous nitrogen blowing condensation function for a plurality of test tubes and the batch whole loading or whole taking-out function for a plurality of test tubes are achieved, and the provided nitrogen blowing concentrator can be widely used in the design and manufacturing fields of nitrogen blowing concentrators.

Description

technical field [0001] The invention belongs to the field of chemical analysis devices, in particular to a nitrogen blowing instrument used for sample preparation. Background technique [0002] Due to the serious problems of milk powder quality and pesticide residues in recent years, the Nitrogen Dryer (Termovap Sample Concentrator, referred to as Nitrogen Blower) has been widely used in sample pretreatment of pesticide residues and dairy products. The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the Standardization Administration of China also stipulate that melamine in milk and other dairy products should be pre-treated with a nitrogen gas drying instrument. [0003] The nitrogen blowing instrument is mainly used for sample preparation in liquid phase, gas phase and mass spectrometry analysis. The nitrogen blowing instrument usually blows nitrogen gas into the surface of the heated sample to concentrate the ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the test tube rack is fixed in the water bath (abbreviated as the bath) and cannot be taken out separately. The test tubes containing the reagents must be taken out one by one after each air blowing, and then the test tubes containing the reagents must be taken out one by one. Put in one by one, time-consuming and laborious

Images