A small and versatile sample chamber for laser-induced breakdown spectroscopy

Abstract

The invention discloses a small multifunctional sample room for LIBS (laser-induced breakdown spectroscopy), whose structure mainly includes an openable closed cavity, a focusing lens arranged on a casing top of the cavity, a sample plate mounted on a rotatable lifting column table positioned at the center of the bottom of the cavity, and a signal collection device placed on the casing wall of the cavity and connected with an external detector, wherein no less than one sample cell is designed on the sample plate, is positioned in the sample plate and can rotate to the position below the focusing lens during the rotation of the sample plate; and a lens of the signal collection device points to the sample cell rotating to the position below the focusing lens. The small multifunctional sample room disclosed by the invention can be used for bearing solid particulates, powders and liquid samples simultaneously for measurement, has the characteristics of excellent focusing performance, tightness and working performance, small volume and the like, can be integrated in a laser optical spectrum analyzer or used independently, and is particularly suitable for simultaneously analyzing in-situ collected scraps, rock and slurry samples in petroleum drilling and geological exploration.

Description

technical field [0001] The invention relates to a laser-induced breakdown spectrum sample detection technology, in particular to a small multifunctional sample chamber which can be used for laser-induced breakdown spectrum analysis. Background technique [0002] In the oil exploration industry, through the analysis of the components of drilling fluid, rock and mud on site, it provides a basis for exploration and development decisions, which is an important method to improve the compliance rate of mud logging interpretation and effectively exploit oil and mineral resources. Introduce real-time in-situ testing technology suitable for simultaneous analysis of multi-components and multi-forms to realize real-time analysis of on-site samples and quickly obtain comprehensive first-hand collection data, so as to make correct mud logging interpretation and evaluation, and improve oil and mineral production. The development efficiency of resources can promote the progress of the indu...

AI Technical Summary

Problems solved by technology

[0004] The sample chamber is a very important part of the LIBS system. At present, in the application process of LIBS technology, the sample chamber is mostly set based on a single mobile platform, which can only realize small-scale movement mainly based on two-dimensional or three-dimensional translation.

The open sample platform is mostly used on the LIBS platform built by the laboratory. Although the sample chamber in the commercial LIBS instrument is made into a closed type after appropriate modification, it can only carry one sample at a time for LIBS measurement, and the powder sample Most of the analysis requires pre-processing such as briquetting, which is contrary to the original intention of using LIBS in situ analysis, and the analysis results are naturally not representative.

In addition, the traditional sample platform is mainly suitable for the determination of large solid samples, and cannot be directly measured for small-volume cuttings, mud, powder and other samples. In the field of petroleum geological exploration, small samples are mostly used as the research object. , especially in the drilling work, most of the fine debris is produced, and the component analysis of the drilling fluid in the form of mud and even the bits of the drill bit is also very important in the effective evaluation of the oil well. Therefore, the traditional LIBS The application of technical sample chambers in oil exploration has great limitations

Images