Guiding deposition strengthening method for detecting ions in water through laser-induced breakdown spectroscopy

Abstract

The invention discloses a strengthening method for detecting ions in water through laser-induced breakdown spectroscopy, which is referred to as 'the guiding deposition strengthening method'. The method includes two action mechanisms: ion forms are transformed by chemical replacement reaction; replacement is realized auxiliarily by electrical field application. The two action mechanisms both adopt active metal target materials as reaction matrixes; the former mechanism realizes transformation of ions deposited on the surfaces of the matrixes through the chemical replacement reaction between active metal and to-be-tested ions in liquor; the latter mechanism connects a power source and the active metal to form an electrical field, leads the ions in the liquor to assemble towards the reaction matrixes, strengthens the chemical replacement reaction and simultaneously auxiliarily finishes electrochemical transformation of parts of the ions; joint action of two processes leads the to-be-tested ions to be transformed and adhered to the surfaces of the matrixes; then, LIBS is adopted to detect an adhering layer so as to achieve the purpose of detecting the ions in water; the whole strengthening action is equal to the process of 'pre-preparation of samples' . The replacement reaction is a main process, and the electrical field application is an auxiliary method.

Description

Technical field: [0001] The patent of the invention is an enhanced method for detecting ions in water by laser-induced breakdown spectroscopy, which belongs to the field of marine technology. Background technique: [0002] Laser Induced Breakdown Spectroscopy (LIBS) is based on the interaction between high-power laser and matter to generate transient plasma. By analyzing the emission spectrum of plasma, it can realize the qualitative and quantitative analysis of detection objects. technology. This technology can realize on-site rapid detection, and has been widely used in many fields of substance composition analysis. However, due to changes in the plasma excitation mechanism and detection methods in liquid environments, it is relatively difficult to achieve underwater detection by laser-induced breakdown spectroscopy, and the sensitivity of ion detection lags behind other spectroscopy techniques (laser-induced fluorescence, mass spectrometry), which seriously restricts the...

AI Technical Summary

Problems solved by technology

However, due to changes in the plasma excitation mechanism and detection methods in liquid environments, it is relatively difficult to achieve underwater detection by laser-induced breakdown spectroscopy, and the sensitivity of ion detection lags behind other spectroscopy techniques (laser-induced fluorescence, mass spectrometry), which seriously restricts the application of LIBS technology. The development of applications in the marine field, therefore, it will be necessary to develop a method for enhancing the sensitivity of ion detection in LIBS water

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