Measurement method for whole vanadium in soil

Abstract

The invention belongs to the technical field of soil analysis measurement and relates to a method for measuring whole vanadium in soil. The method comprises the steps of weighting and placing a soil sample into a conical bottle, adding aqua regia, heating the soil sample dry on an electric furnace with a ventilation cabinet, taking down the soil sample, cooling the soil sample, adding perchloric acid, heating again to emitting white smoke, removing nitric acid after the soil sample is in ropiness, taking down the soil sample to cool, adding diluted hydrochloric acid to dissolve, filtering with distilled water to be arranged in a measuring flask in a constant volume mode, shaking up, standing, obtaining vanadium-contained soil solution to be measured, placing the vanadium-contained soil solution into a colorimetric tube, sequentially adding a color developing agent, hydrogen dioxide solution and hydrochloric acid solution, then sequentially adding a screening agent to stand and shake up to be placed, measuring absorbance of colored complex at the 575nm wave length position with a cuvette, recording measurement results, analyzing and calculating. The method is simple in technical process, reliable in measurement principle, accurate in measurement effect and data, friendly in measurement environment, and widely suitable for measuring various kinds of vanadium-contained soil.

Description

Technical field: [0001] The invention belongs to the technical field of soil analysis and testing, and relates to a method for measuring the total amount of vanadium in the soil, in particular to a method for determining the total amount of vanadium in the soil by using aqua regia-high chlorine digestion, and using 1-(2-pyridylazo)-2-naphthalene Phenol (PAN) is used as the color reagent, and the surfactant sodium dodecyl sulfonate (SDBS) is used as the sensitizer to measure the pollution status of heavy metal vanadium in the soil environment by spectrophotometry. Background technique: [0002] Vanadium (V) is a new metal discovered by Swedish chemist Sefstrom N G from Scandinavian iron ore in 1805. It is named Vanadium following the name "Vanadis" of the Scandinavian legend of love and goddess. Due to its high melting point and the ratio of elastic modulus to density similar to that of steel materials, vanadium is widely used in structural materials. According to the statis...

AI Technical Summary

Problems solved by technology

In my country, there are only methods for the determination of vanadium in silicate rocks (GB / T14506.22-1993) and methods for the determination of vanadium in coal (GB / T19226-2003). There is no standard method for the determination of vanadium in soil, and there is a lack of V in soil Without analytical methods, it is impossible to study the content of V in soil, pollution degree, environmental effects, etc.; (2) The instruments involved in the catalytic kinetic method, fluorescence analysis method, wavelet transform method and ICP method currently used in the determination of trace V in water are in the Environmental monitoring stations and soil laboratories are not commonly equipped. Even if these methods can be applied to the determination of V in soil after modification, it is difficult to popularize and apply them; (3) The spectrophotometric method can successfully measure trace V in water. Monitoring stations and soil laboratories are generally equipped, but the three-phase coexistence of soil solid, liquid and gas, and the complex system of organic, inorganic, biological and other types of co-existence, when extracting V in the soil, many interference factors in the extraction solution affect the spectrophotometry law application, it is necessary to effectively mask and eliminate interference

Images