SU1099075A1 - Method of determining alkali and acid content in rock containing accessory maghemite - Google Patents

Abstract

METHOD FOR DETERMINING alkali NOSTA AND ACIDITY OF ROCK With accessory maghemite, based on the sample study, characterized in that in order to improve performance, the sample is heated in the heating process is measured by its magnetic susceptibility, compared kazhtsoe measurement at gfedyduschim and as measured the magnetic susceptibility of the sample determines the temperature of the transition of maghemite to hematite, and the ratio of pi 3.7, pH 0.01467 T o t is the transition temperature of maggde hemite to hematite, kn determines the amount of alkali STI and acidity of rocks.

Description

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N f f The invention relates to methods for measuring acidity and alkalinity (pH) in various media containing the accessory MarreMHTj and can be used for prospecting, assessing and delineating the rocks that are sought in the weathering zone. The known method of determining the acidity and alkalinity (pH) of rocks existing under the name of the Alma method or calorimetric, color, based on the property of some indicators to change color failure depending on changes in the pH value of the medium. The test sample is prepared for analysis by making a water extract from the rock. After the aqueous extract is obtained, the pH is measured. To do this, a universal indicator is added to the resulting aqueous extract, and the contents are stirred with gentle shaking. The color of the solution will change. Based on the obtained color of the water extract, a standard is found, the color of which co-falls with the color of the test water extract. The figure indicated near this standard will denote the pH value of the water extract from the gbrna rock and the rock itself l3. The disadvantage of this method is the large laboriousness associated with the preparation of the aqueous extract, which causes its low efficiency,. Its reliability is also low due to the subjective choice of a standard whose color matches the color of the investigated water extract. The closest to the proposed method is the determination of alkalinity and acidity (pH) of rocks, based on the study of samples by measuring the electromotive force that occurs when extraction of rock from two different electrodes. Selected samples are prepared for analysis by making a water extract from them. After that, two electrodes of a laboratory pH meter, for example, LP-58, are immersed in the obtained extract, and the potential difference arising at the electrodes is recorded on it, the value of which is The pH value in water drawing and rock 2 The disadvantage of the known method is its low efficiency, which is associated with great complexity in the manufacture of water drawing. The aim of the invention is to increase the efficiency of measuring alkalinity and acidity (pH) of rocks by reducing the time spent on its implementation. The process of heating is measured by its magnetic susceptibility of the sample, each subsequent measurement is compared with the previous one and the changes in the magnetic susceptibility of the sample are determined the transition temperature of maghemite to hematite, and the ratio of pH 0.01467 T ° + 3.7 i where T is the transition temperature of magge-. Because of the amount of alkalinity and acidity of rocks, it is known that, when heated, artificial maghemite changes its transition temperature to hematite, depending on the amount of impurities present in it. It is established that natural maghemite is able to absorb impurities from the environment. This means that during the oxidation of magnetite to maghemite it will contain additional impurity ions. In the peripheral parts of the grain and in the cracks where maghemite is developed, an elevated content of Ni ions is seen. by increasing the temperature j-xFe O, to hematite oCFe-0,.temperature with a correlation coefficient of 0.87. The method of determining the alkalinity and acidity (pH) of rocks, such as hyper-slugs, is carried out as follows. A sample was taken from the selected samples. 1-10 g. Heated this sample. AT

310990754

During the heating process, magnetic rocks are measured to a size determined by meso-susceptibility. It is determined by the tempetodical, making water extract, at which the magnetic perception, as well as the fabrication itself (enamel

Immunity acquires maximum output disappears. This determines the value that is the point of Transition j with technical and economic effect. With

maghemite contained in the sample, this increases the efficiency of hematite. The obtained value of the temporal method by reducing

Perurature is substituted for the time required for analysis. In ISPs 0.01467 TLQ + 3.7 and a well-known measuring method for proving a quantity that characterizes the grinding methods of one sample and the acidity - the acidity (pH) of the rock.

In the proposed method for determining practical data (timekeeping)

Accuracy and acidity (pH) requires 10 minutes. Subsequent analysis

The need for crushing operations takes 2-3 minutes.

Claims (1)

METHOD FOR DETERMINING ALKALI * ROCKS AND ACIDITY OF ROCKS With ACCESSORAL MAGHEMITE, based on the study of samples, characterized in that, in order to improve performance, the test sample is heated, its magnetic susceptibility is measured during heating, each subsequent measurement is compared with the previous one, and the temperature of maghemite to hematite is determined from measurements of the magnetic susceptibility of the sample , and by the pH ratio of 0.01467 T ° + 3.7, where T ° is the temperature of the transition of maghemite to hematite, the alkalinity and acidity of rocks are judged.