Full-automatic digestion acid driving instrument

Abstract

The invention relates to a full-automatic digestion acid driving instrument, and belongs to the technical field of analysis and detection experimental equipment. The instrument comprises a liquid supply device, a heating device, an acid gas absorption device, a sealing device, a digestion pipe frame and a pipe frame rotating device, the pipe frame rotating device is arranged in the center of the heating device, the liquid supply device is arranged on the side face of the heating device, the sealing device is arranged above the heating device, the acid gas absorption device is connected above the sealing device, and the pipe frame rotating device is fixed to the digestion pipe frame. The invention can realize the functions of automatically and quantitatively adding acid liquor, uniformly heating a sample, absorbing acid gas generated in the digestion and acid driving processes and the like, so that the harm of chemical reagents to operators is reduced, the uniformity and consistency ofthe sample digestion process are maintained, meanwhile, the pollution to the environment is reduced, and the instrument has the advantages of high efficiency, good precision, safety, environmental protection and the like.

Description

technical field [0001] The invention relates to a full-automatic digestion and scavenging instrument, which belongs to the technical field of analysis and detection experimental equipment. Background technique [0002] In the analysis and testing industry, in order to effectively detect the content of heavy metals in solid samples such as soil, minerals, and food, experimenters often need to perform acid digestion and rush acid treatment on the samples in advance, so that the heavy metals in the solid samples are transferred into the solution for subsequent follow-up. Use atomic fluorescence spectrometer, atomic absorption spectrometer, inductively coupled plasma mass spectrometer and other large-scale precision instruments for analysis and measurement. At present, graphite digestion is a common pretreatment method, that is, under high temperature conditions, the thermal conductivity of graphite is used to heat the solid sample, and the sample is transformed from a solid sta...

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Problems solved by technology

There are some problems with this method at present. First, analysts manually add different types of acid to the sample. This step is cumbersome and time-consuming, and the acid is volatile, toxic and corrosive, and direct contact will cause damage to the sample. The health of the experimenters is harmful; the second is that the graphite blocks in some graphite digestion instruments currently on the market have defects of uneven heating, and the temperature difference between the graphite block holes is large, which leads to poor parallelism of sample digestion and inaccurate experimental test data The third is that during the acid removal process in some laboratories, the acid mist volatilized from the samples in the digestion tube was not effectively treated, and was directly discharged into the outdoor atmosphere through the fume hood, causing environmental pollution

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