Rotary channel type laser denudation pool

Abstract

The invention provides a rotary channel type laser denudation pool, which at least comprises an outer cavity and a sample seat installed in the outer chamber, wherein the outer cavity is hollow, an air inlet and an air outlet are formed in the side wall of the outer cavity, and a slot and a top cover are arranged at the top of the outer cavity; an analysis window is arranged on the top cover; the sample seat is in the shape of a flat cylinder and is composed of a seat of samples to be measured and a standard sample seat; a rotating handle is arranged on the side wall of the outer cavity, and a rotary supporting base is arranged at the bottom of the outer cavity, is connected with the rotating handle through a transmission component and can be driven by the rotating handle to rotate. The rotary channel type laser denudation pool provided by the invention can be used for significantly reducing the sample change efficiency, and eliminating the position effect of a common denudation pool in an analysis process; an analysis volume in the practical analysis process is small, a memory effect is very low, and a single-pulse cleaning time is shorter than 1s; a standard sample and a sample to be measured can be quickly positioned; cross contamination on the surfaces of analysis samples can be avoided.

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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