A device for direct analysis of solid samples

Abstract

The invention discloses a direct analysis device of solid samples, wherein a sample pool is installed on a three-dimensional moving platform, a microscopic imaging system is aligned to a solid sample in the sample pool, a laser beam emitted by a picosecond laser is focused onto the surface of the sample in the sample pool through a laser optical system, particles generated by laser ablation enter an inductively coupled plasma source mass spectrometer through an aerosol transmission system, the direct analysis device has the advantages that the laser wavelength can be selected from 1064 nm, 532 nm, 355 nm and 266 nm, the pulse width is 30 ps, the pulse frequency is 20 Hz, the pulse energy is continuously adjustable, and the maximal pulse energy of 266 nm reaches 3.0 mJ; the position of the sample pool is three-dimensional controllable, and the transmission pipeline of the aerosol transmission system switched by a tee solenoid valve is short; a non-coaxial system is adopted to quickly focus and position the sample ablation position. As shown in analysis, basically no element fractionation effect exists in the elements of low alloy steel, pure copper, pure aluminum and the like, and basically no matrix effect exists in the elements of iron base, copper base, aluminum base and the like.

Description

technical field [0001] The invention relates to a component analysis device, in particular to a direct analysis device for solid samples. Background technique [0002] Inductively coupled plasma mass spectrometry (ICP-MS) is an element and isotope analysis technique developed in the 1980s that uses ICP as an ion source and generally uses a quadrupole as a mass analyzer. ICP-MS can perform qualitative analysis, semi-quantitative analysis, quantitative analysis, isotope ratio analysis, and element speciation analysis combined with separation techniques. ICP-MS detection limit is low (ppt level), linear dynamic range is wide (up to 9 orders of magnitude), the spectrum is relatively simple, the precision is good, the detection mass range is 6-260, almost all elements can be analyzed, and it can be replaced Atomic Absorption Spectroscopy, Inductively Coupled Plasma Spectroscopy, X-ray Fluorescence Spectroscopy, and more traditional Mass Spectrometry are powerful tools for the an...

AI Technical Summary

Problems solved by technology

[0010] The present invention develops a set of picosecond ultraviolet laser ablation solid sampling system that is not commercialized in the world at present, realizes the combination with ICP-MS, debugs and optimizes it, and is used for direct analysis of fixed samples

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