Small and portable heavy metal detection device and detection method

Abstract

The invention discloses a small portable heavy metal detection device. The small portable heavy metal detection device comprises an enrichment evaporator, a low-temperature plasma exciter and a spectrum detection device, wherein the enrichment evaporator comprises a reaction cavity; the upper part and the lower part of the reaction cavity are provided with a sample inlet and a waste liquid outlet, respectively; the reaction cavity is internally provided with a reaction wire and a reference wire; the reference wire is only connected with the positive electrode of a power supply; two ends of the reaction wire are connected with the positive electrode and the negative electrode of the power supply, respectively; the low-temperature plasma exciter comprises an excitation cavity; the top end of the excitation cavity is provided with an observation window and a waste gas outlet; two ends of the excitation cavity are connected with a power supply of a neon lamp; the lower part of the excitation cavity is communicated with the upper part of the reaction cavity; the spectrum detection device comprises a CCD (charge coupled device) spectrograph and an optical fiber probe which are connected with each other; the optical fiber probe is installed on the observation window of the excitation cavity; the CCD spectrograph can be connected with a computer. The small portable heavy metal detection device is simple in structure, low in cost, small in size and convenient to carry, can enrich heavy metal in a to-be-detected liquid effectively, can excite detection and can achieve field analysis of detection data.

Description

technical field

[0001] The invention relates to a detection device, in particular to a small and portable heavy metal detection device and detection method. Background technique

[0002] Existing commercial heavy metal pollutant measurement equipment is mainly based on atomic spectroscopy technology, inorganic mass spectrometry analysis technology, ultraviolet-visible spectral absorption technology and electrochemical analysis technology. Among the equipment for heavy metal detection: atomic spectrometer and mass spectrometer are complex in structure, expensive and expensive, and the sample pretreatment is cumbersome, neither of which can realize on-site analysis of samples; although ultraviolet-visible spectral absorption method and electrochemical method Inexpensive, but there are problems such as low analytical sensitivity and poor repeatability, and the detection of ultra-trace heavy metal components in the liquid phase cannot be realized. Contents of the invention ...

Examples

Embodiment Construction

[0022] The small and portable heavy metal detection device of the present invention includes an enrichment evaporator 1 , a low-temperature plasma exciter 2 and a spectrum detection device 3 .

[0023] The heavy metal detection device detects heavy metals. The enrichment evaporator 1 is responsible for enriching the heavy metals in the liquid to be tested, and heating them instantaneously to form metals, and then using the low-temperature plasma exciter 2 to generate low-temperature plasma, so that the generated low-temperature The metal vapor is excited to generate characteristic excitation lines, and then the spectrum detection device 3 receives these characteristic excitation lines to complete the detection and analysis of heavy metals.

[0024] The enrichment evaporator 1 includes a reaction chamber 4. The upper and lower parts of the reaction chamber 4 are respectively provided with a sample inlet 5 and a waste liquid outlet 6. The reaction chamber 4 is equipped with a rea...

technical field

[0001] The invention relates to a detection device, in particular to a small and portable heavy metal detection device and detection method. Background technique

[0002] Existing commercial heavy metal pollutant measurement equipment is mainly based on atomic spectroscopy technology, inorganic mass spectrometry analysis technology, ultraviolet-visible spectral absorption technology and electrochemical analysis technology. Among the equipment for heavy metal detection: atomic spectrometer and mass spectrometer are complex in structure, expensive and expensive, and the sample pretreatment is cumbersome, neither of which can realize on-site analysis of samples; although ultraviolet-visible spectral absorption method and electrochemical method Inexpensive, but there are problems such as low analytical sensitivity and poor repeatability, and the detection of ultra-trace heavy metal components in the liquid phase cannot be realized. Contents of the invention ...

Examples

Embodiment Construction

[0022] The small and portable heavy metal detection device of the present invention includes an enrichment evaporator 1 , a low-temperature plasma exciter 2 and a spectrum detection device 3 .

[0023] The heavy metal detection device detects heavy metals. The enrichment evaporator 1 is responsible for enriching the heavy metals in the liquid to be tested, and heating them instantaneously to form metals, and then using the low-temperature plasma exciter 2 to generate low-temperature plasma, so that the generated low-temperature The metal vapor is excited to generate characteristic excitation lines, and then the spectrum detection device 3 receives these characteristic excitation lines to complete the detection and analysis of heavy metals.

[0024] The enrichment evaporator 1 includes a reaction chamber 4. The upper and lower parts of the reaction chamber 4 are respectively provided with a sample inlet 5 and a waste liquid outlet 6. The reaction chamber 4 is equipped with a rea...

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