Electrode detecting device and method for oxidation strength value of geo chemical samples

Abstract

The present invention relates to the obtaining of evaluation index via measuring physical and chemical parameters of geochemical sample, and is especially the detecting device and method of oxidation strength Eh of geochemical sample. The device consists of two containers holding the same kind of solution and connected via salt bridge; one sample electrode set inside one of the containers, one reference electrode set inside the other container, and one potentiometer or acidometer connected via wires to the two electrodes. After the pH value of the sample is measured with the potentiometer or acidometer, the true Eh value of the sample may be calculated based on Nernst equation. The present invention has high repeatability of the measured data, and provides one reliable evaluation index for geochemical search of ore, especially uranium ore.

Description

Technical field: [0001] The invention relates to the field of obtaining evaluation indexes by means of measuring physical and chemical parameters of geochemical samples, in particular to a measuring device and a measuring method for the oxidation intensity Eh value of geochemical samples. Background technique: [0002] Since G.J.GoVett of Australia proposed the geoelectrochemical theory of sulfide ore bodies in the 1980s, in addition to the content data of elements, indicators such as Eh value and pH value have also been used in the geochemical indicators commonly used in geochemical exploration. For the pH value, the determination method is very simple, and the measured data is also very reliable, but it is very difficult to obtain a reliable and stable Eh value. The main reason is that the measured system (solution containing the sample) is in a dynamic exchange process with the oxygen in the air, which makes the Eh value of the measured system constantly change. How to a...

AI Technical Summary

Problems solved by technology

For example: the most commonly used and simplest method is to add a certain amount of distilled water to the sample powder to make a suspension solution, and directly insert the electrode into the solution for measurement. This method makes the "reproducibility" of the measured data extremely poor, even in In a very short period of time (a few minutes), the same sample is repeatedly measured several times, but the data obtained each time are different, and the result obtained is not the true Eh value of the sample itself, which affects the correct evaluation of the prospecting index

Images