Integrated and portable instrument for rapidly analyzing heavy metals as well as analysis and detection method thereof

Abstract

The invention provides an integrated and portable instrument for rapidly analyzing heavy metals as well as an analysis and detection method thereof. The instrument comprises the following components:a liquid sample introduction device (1), a pneumatic micro atomization system (2, 3, 4, 5, 6, 8, 9, 10), a corona discharge system (7, 11, 12, 13) and a spectrum system (14, 15, 16), wherein the pneumatic micro atomization system comprises a sheath gas carrying bottle (2), a secondary gas carrying bottle (3), a tee a (4), a tee b (5), a tee c (6), a fluid channel (8), a sheath gas channel (9), anda secondary gas channel (10); liquid to be measured in the liquid sample introduction device (1) enters the fluid channel (8) through a middle port of the tee a (4); the sheath gas carrying bottle (2) introduces the carrying gas into the sheath gas channel (9) through a middle port of the tee b (5); the secondary gas carrying bottle (3) introduces the secondary gas to the secondary gas channel (10) through a middle port of the tee c (6); the fluid channel (8), the sheath gas channel (9) and the secondary gas channel (10) are arrangement in a coaxial arrangement. One carrying gas channel is added to the analyzer, so that rapid and effective quantitative analysis of heavy metal samples can be guaranteed, and at the same time loss of sample ion beam is reduced, and accuracy and precision ofapparatus detection are improved.

Description

technical field [0001] The invention relates to a portable detection device for analyzing heavy metal content in liquid by corona discharge and spray integrated emission spectrum, in particular to an integrated portable fast heavy metal analyzer and its analysis and detection method, belonging to the technical field of environmental analysis chemistry. Background technique [0002] Heavy metal pollution is one of the most widely polluted and most harmful problems in today's environmental pollution. The sources of heavy metal pollution in the environment are mainly waste gas, waste water and waste residues discharged by mining, smelting and other industrial and mining enterprises, the combustion of fossil fuels such as coal and petroleum, and the excessive use of pesticides and fertilizers, which mainly include Hg, Cd, Pb, Cr, Zn, Cu, Ni and metalloid As etc. Extensive sources of heavy metals make heavy metal pollution in the atmosphere, water and soil environment more and m...

AI Technical Summary

Problems solved by technology

[0005] The inventors of the present application found in the research that the existing portable detection device is only designed with one carrier gas channel for atomizing liquid samples, and the generated spray will inevitably escape, resulting in the loss of the substance to be tested and the pollution of the lens surface , so that the detection results are deviated; the existing portable detection device uses a conventional platinum wire coil electrode, the contact surface between the platinum wire coil electrode and the liquid to be tested is small, and it cannot be effectively ionized, which affects the ionization efficiency of the sample to be tested and reduces The accuracy of the device detection

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