Thermal desorption and sampling device for methyl mercury

A technology of thermal analysis sample injection and methylmercury, which is applied in the direction of measuring devices, analytical materials, instruments, etc., can solve the problems of inability to disassemble and separate control, inability to achieve joint use, inconvenient operation, etc., and achieve simple and efficient testing process, structure Simple, easy-to-use effect

Inactive Publication Date: 2015-06-17
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0004] Existing thermal desorption sampling devices are often improved from gas chromatograph inlets, with complex structures; the adsorption tubes used are all special accessories for specific chromatography, which are expensive; the inlets are always at relatively high temperatures,

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  • Thermal desorption and sampling device for methyl mercury
  • Thermal desorption and sampling device for methyl mercury
  • Thermal desorption and sampling device for methyl mercury

Examples

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Embodiment Construction

[0018] Attached below Figure 1-5 The technical scheme of the present invention is further described.

[0019] like Figure 1-5 , the present invention provides a methylmercury thermal analysis sampling device, including a flow meter 5, a thermal analysis device and a housing 12, and the thermal analysis device includes a heating coil 4, a heating power supply 11, a heating switch 6 and a heating power supply voltage The regulator 10, wherein the heating switch 6 is a single or double countdown switch.

[0020] The flow meter 5 is a rotameter, and the argon flow can be adjusted through the flow meter knob 2. The flow meter 5 is installed on the front aluminum plate 13 of the methylmercury thermal desorption sampling device, and the lower end passes through the front aluminum plate 13 and then connected The 1 / 8-inch PFA gas pipeline passes through the aluminum plate 14 at the rear of the methylmercury thermal desorption sampling device. Both sides of the aluminum plate use Te...

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Abstract

The invention discloses a thermal desorption and sampling device for methyl mercury. The thermal desorption and sampling device comprises a flow meter and a thermal desorption device, wherein the thermal desorption device comprises a heating coil, a heating power supply, a heating switch and a heating power supply and voltage regulator; when an experiment for determining the content of the methyl mercury is carried out, an argon bottle is firstly opened; argon enters the lower end of the flow meter through a PFA gas pipeline, then flows out from the upper end of the flow meter, and enters a methyl mercury-enriched Tenax adsorption pipe through the PFA gas pipeline; and the heating coil sleeves the adsorption pipe. According to the thermal desorption and sampling device, carrier gas flow control and heating desorption devices are integrated; the thermal desorption and sampling device is simple in structure and convenient to operate; thermal desorption and sampling operation on the methyl mercury are greatly simplified; experiment efficiency is improved; and compared with devices with the similar functions, the thermal desorption and sampling device is extremely low in construction cost.

Description

technical field [0001] The invention relates to a chemical analysis device, in particular to a methylmercury thermal analysis sampling device. Background technique [0002] In the analysis method of methylmercury, high performance liquid chromatography (HPLC) or gas chromatography (GC) are generally used for separation. HPLC can achieve a good separation effect, but due to the dilution of the mobile phase, it often leads to a high detection limit. Usually, the method of liquid-liquid extraction or solid-phase extraction is used to enrich the sample, and the operation is cumbersome. GC is easy to combine with purge and trap (P&T), solid phase microextraction (SPME) and other methods. It has the advantages of low matrix interference, easy operation, etc., and has high sensitivity. [0003] For the determination of samples with trace amounts of methylmercury content, water phase ethylation derivatization-purge and trap technology is often used abroad. This method first carries...

Claims

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Application Information

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IPC IPC(8): G01N30/16G01N30/04
Inventor 毛宇翔麻冰涓程柳邢明飞李艳利黄兴宇田采霞邰超张东李卫国
Owner HENAN POLYTECHNIC UNIV
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