Mercury speciation analysis and pyrolysis device with adjustable and controllable temperature and flow rate, and using method

Abstract

The invention discloses a mercury speciation analysis and pyrolysis device with adjustable and controllable temperature and flow rate, and the device comprises a push rod sampling boat, a pyrolysis chamber, an analysis cell and an exhaust gas treatment system, which are connected in turn to form an overall analysis and pyrolysis device; the pyrolysis chamber and the analysis cell are connected with a temperature control system; and a carrier gas flow rate control system used to extract the products decomposed by the sample in the push rod sampling boat and make the products flow through the analysis cell to the exhaust gas treatment system is set between the analysis cell and the exhaust gas treatment system. The pyrolysis chamber provided by the invention has a plurality of different regions, and at the same time, the regions are temperature-controlled by the temperature control system to realize analysis of various different forms of mercury. And the carrier gas flow rate control system and exhaust gas treatment system are provided to control and process the analyzed flow rate of the exhaust gas to avoid potential safety hazards.

Description

technical field [0001] The invention relates to the technical field of element speciation analysis, in particular to a mercury speciation analysis pyrolysis device with adjustable temperature and flow rate and a use method. Background technique [0002] The determination of mercury content by pyrolysis method has the advantages of rapidity and zero pollution, which is beyond the reach of other traditional mercury content analysis methods (such as atomic fluorescence spectrometry). The principle of mercury content determination by mercury speciation analysis pyrolysis device: Mercury has different vapor pressures at different temperatures, and mercury vapor has a characteristic absorption of 253.7nm wavelength; mercury-containing molecules have different total bond energies, and different mercury-containing molecules Different heat needs to be absorbed during decomposition. Since the binding states of mercury in various types of samples are diverse, each has its characterist...

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Problems solved by technology

However, for the above-mentioned several devices, there is no design for temperature and carrier gas control, and there is no treatment for the subsequent exhaust gas. Therefore, the test range it is suitable for is very limited, resulting in the inability to carry out mercury speciation analysis, and it is easy to cause certain safety hazards to the test personnel. Hidden danger

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