Method for rapidly and simultaneously determining content of six elements in chromite by microwave digestion-ICP (Inductively Coupled Plasma)-AES (Atomic Emission Spectroscopy)

Abstract

The invention relates to a method for rapidly and simultaneously determining the content of six elements in chromite by microwave digestion-ICP (Inductively Coupled Plasma)-AES (Atomic Emission Spectroscopy). A test sample is pretreated through microwave digestion by taking hydrochloric acid, nitric acid and sulfuric acid as a digestion agent; in order to correct physical interferences and ionization interferences, Si, Mg and Fe are corrected by adopting Y242.220 horizontal low wave and Al, Ca and Cr are corrected by adopting Y371.030 horizontal high wave; and an interior label mixing pipe is added online so as to ensure accurate and stable flow. The method is established on an ICP instrument; the content of elements including SiO2, Al2O3, CaO, MgO, Fe and Cr2O3 in a sample is calculated through a standard curve method; and the precision, accuracy and recycling ate of the method are verified by standard reference materials. According to the method, the pre-treatment of the sample is simple and loss and pollution of the elements in a sample decomposition process are avoided; the established method is rapid, accurate and reliable and the problems of an existing method for simultaneously determining the six elements in the chromite that the process is complicated, the operation is tedious and complicated, the period is long and the accuracy is poor are solved; and new references are provided for detection and analysis of the content of the six elements in the chromite.

Description

technical field [0001] The invention relates to a rapid detection method of six elements in chromite, in particular to a detection method for rapidly and simultaneously measuring the content of six elements in chromite by using microwave digestion-inductive coupling-plasma emission spectroscopy (ICP-AES). Background technique [0002] Chromite is an extremely widely used mineral source in the metallurgical and chemical industries. In the metallurgical industry, chromite can be used to prepare ferrochromium, so as to further prepare chromium-containing steel. In the chemical industry, chromite is the raw material for most chromium compounds, and can be used to prepare sodium dichromate and so on. Chromite can also be used to produce refractory materials. The refractory chrome bricks made of chromite are almost neutral, and can resist acid and alkali corrosion at high temperatures. The composition of chromite has a decisive influence on its application, so the content of eac...

AI Technical Summary

Problems solved by technology

[0004] To sum up, due to the different chromium content in chromite ore, it is difficult to pre-treat the sample, while other methods have the problems of insufficient decomposition and low accuracy.

It can be seen that there is no method for the simultaneous determination of the six elements in chromite that is simple, fast and accurate in sample processing.

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