Research And Discussion On Analytical Methods Of Silica In Geological Rock Mineral Samples

The development of Chinese economy can't be separated from the exploitation and utilization of resources,and the exploitation of resources will promote the continuous development of the economy.There is vast territory and abundant resources in China,and rich mineral resources are the foundation of rapid development of national economy.The development of geological mining would also reflect the development of national economy.The rock mineral analysis which was always called“the geological eyes”is an important part of geological research.The rock mineral analysis is often used to clarify the proportion of each element,and it has a significant guiding effect on determination the classification of minerals and the subsequent mining of geology.Therefore,the accuracy of results detected by rock mineral analysis is the basic of geological rock mineral exploration.Because error scope and rationality of the analysis results would be determined by analytical methods,so choosing an accurate experimental analysis method is the key point to rock mineral analysis research.The method of rock mineral analysis should be determined by rock types and geological conditions.The methods of geological rock mineral analysis usually consist of the instrumental analysis method and the chemical analysis method.The instrumental analysis method includes X-ray fluorescence spectroscopy?XRF?,Atomic Absorption Spectrometry?AAS?,Atomic emission spectrometry?AES?,Inductively Coupled Plasma spectroscopy?ICP?and so on;the chemical analysis method mainly includes weight analysis and content analysis.The instrumental analysis method possesses many good characteristics,such as high sensitivity,good selectivity,easy operation,and fast analysis,so it is suitable for trace and ultra-trace component analysis.However,there are many disadvantages in the instrumental analysis method,such as large relative error,high costs and limited popularity.Different from the instrumental analysis method,the chemical analysis method exhibits low cost,easy operation and accurate result,so it is irreplaceable in the quantitative analysis area of geological rock mineral samples.In this work,we aim at choosing a suitable the chemical analysis method to detect SiO₂content in the analysis of silicate rock system.To improve and expand the weight method of SiO₂ animal glue coacervation,many researches have been done to analyze the effect of temperature,acidity and the amount of animal glue on the results.The precision test and the accuracy test are also detected to evaluate the feasibility of the modified experimental method.The experimental improvement scheme has been successfully applied to the actual geological experiment test and analysis system.