A portable element analyzer and its detection method that can be used for field survey

Abstract

The invention discloses a portable elemental analyzer that can be used for field investigation, comprising: a sample introduction system, an electrolyte discharge plasma generation system, an optical path collection and filtering and sorting system, a data processing system and a control system; The system introduces the sample into the electrolyte discharge plasma generation system for glow discharge to emit element spectrum, which is collected by the optical path collection and filter sorting system and transmitted to the data processing system, and finally displayed and collected by the control system. The above-mentioned control system controls the sampling system, the electrolyte discharge plasma generation system, the light path collection and filter sorting system and the data processing system. The invention provides a metal element analysis device which does not need to acidify samples in advance, does not need carrier gas, has more stable discharge, is easy to operate, has cheap equipment and is small in volume. The detection method of the invention has automatic detection, simple operation, strong field adaptability, and greatly improves field detection speed and precision.

Description

technical field [0001] The invention relates to a metal element analysis device, in particular to a small-volume, low-cost, and easy-to-operate portable element analyzer and a detection method for on-line detection of liquid samples. Background technique [0002] In the detection of metal elements in water, traditional detection methods such as complexometric titration, electrochemical method, inductively coupled atomic emission spectrometry, etc. often have one or another defect and deficiency. The operation is complicated and it is difficult to realize the real-time and continuous detection of metal elements in water. The electrolyte glow discharge technology that has emerged in recent years can just make up for these shortcomings. Its basic structure is as follows: the electrolyte solution is led out through one end of a vertical conduit through the sampling device to form a fountain, and a certain positive voltage is applied near the lead-out end with a metal electrode t...

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Problems solved by technology

[0003] However, for the current research on electrolyte glow discharge technology, the spectral detection part is collected and processed by spectrometers, such as a combined spectrometer using a monochromatic spectrometer and a photomultiplier tube as a detector or a portable spectrometer. Large volume and high cost reduce the portability of metal ion detection instruments based on the principle of electrolyte glow discharge, thus limiting the widespread application of electrolyte discharge photoelectric detection technology

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