A rotating channel laser ablation pool

Abstract

The invention provides a rotary channel type laser ablation cell, which at least includes an outer cavity and a sample seat installed in the outer cavity, the outer cavity is hollow, and its side wall is provided with an air inlet and a drain. Gas port, the top of the outer cavity is provided with a card slot and a top cover; the top cover is provided with an analysis window; the sample seat is in the shape of a flat cylinder and is composed of a sample seat to be tested and a standard sample seat; the external cavity A rotary handle is provided on the side wall of the outer cavity, and a rotary support base is provided at the bottom of the outer cavity, and the rotary support base is connected with the rotary handle through a transmission part and can rotate under the drive of the rotary handle. The invention can significantly reduce the frequency of sample replacement; eliminate the position effect in the analysis process of conventional denudation pools; the analysis volume in the actual analysis process is small, the memory effect is extremely low, and the single pulse cleaning time is less than 1s; it can quickly clean standard samples and samples to be tested Sample positioning; avoids cross-contamination of analytical sample surfaces.

Description

technical field [0001] The invention provides a laser ablation pool, which belongs to the field of laser ablation plasma light / mass spectrometry analysis. Background technique [0002] Laser ablation inductively coupled plasma light / mass spectrometry is one of the most successful and effective techniques for direct element or isotope analysis of solid samples. When performing laser ablation inductively coupled plasma / mass spectrometry, the sample is usually placed in an ablation cell, and the laser ablation sample surface produces analyte aerosol, which is sent to the plasma light / mass spectrometer for detection by the carrier gas. [0003] The interior of the conventional denudation pool is a whole cylindrical or cuboid space with an analysis volume of 100cm 3 -200cm 3 , the cleaning time after single-pulse ablation can be as long as 10s. The analyte aerosol generated by laser ablation rotates repeatedly in the ablation pool, which is easy to contaminate the surface of ot...

AI Technical Summary

Problems solved by technology

[0005] However, due to the cuboid structure adopted in this design, the sample seat can only move back and forth in the outer chamber in a straight line. In order to make all the samples reach the analysis window, the inner length of the outer chamber must be at least twice that of the sample seat, which wastes a lot of space and affects the stability of the device. tightness

Since the laser ablation analysis process requires repeated alternate analysis of the standard sample and the sample, several sample target positions of the device are arranged in a straight line, and the standard sample usually occupies one sample position. Frequent back and forth movement of the sample seat is required, which seriously affects the positioning of the sample point and affects the analysis efficiency

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