Ultra high sensitivity analysis of mercury in the air using a newly developed optical system

WA-5A is a gas mercury analyzer that can be connected to an automatic sampler (TC-WA) specifically designed for mercury collection tubes. On the basis of the double mercury amalgam method, the instrument design has been updated. The WA-5A is not only equipped with high-performance optional configurations for measuring mercury in different valence states in ambient air and various gases (LPG/LNG, flue gas, etc.), but also uses a newly developed optical system as standard configuration to prevent gas sample loss. The instrument can automatically set the measurement range and achieve measurement from low concentration to high concentration.

FDFDFD'>The sample gas is collected into a mercury collection tube, which is then placed into the heating furnace of WA-5A for measurement. Mercury evaporated due to high temperature heating is purified and dehumidified. Then, mercury is collected as a gold amalgam in a collection tube for further purification. The collection tube is reheated, releasing atomic mercury, and the mercury concentration is measured by atomic absorption spectroscopy.In addition, the sample can be directly injected using an airtight syringe.

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The use of new technologies

By adopting newly developed technology, the instrument has added new functions.

· Specially designed for mercury collector tubes30The automatic sampler of the position improves the efficiency of analysis.

· By using a new optical system, the instrument can automatically set the measurement range while achieving a transition from low concentration to high concentration (up to)1，000 ng）The measurement.

· The detection lower limit is1 pg.

· No need to prepare special gases or high-pressure gas cylinders. The indoor ambient air is purified and used as a carrier gas to ensure economy and safety.

· Can be obtained fromTedlarDirectly measure the sample using a sampling bag or high-pressure gas cylinder.

Complies with Japan's "Measurement Method for Hazardous Air Pollutants"

FDFDFD'>This instrument complies with the "Measurement of Mercury in the Atmosphere" method in the "Measurement Methods for Hazardous Air Pollutants" developed by the Japanese Ministry of Environment. It can easily and quickly detect mercury in the gas collected by gold amalgam in the mercury collection tube.

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Application and detection methods

Optional configuration

TC-WA sampling tube automatic sampler (30 positions)

FDFDFD'>WA-5A can be used with Used in conjunction with TC-WA 30 bit sampling tube automatic sampler. The sampling tube is placed in In TC-WA, fully automatic desorption of mercury vapor completes secondary mercury homogenization Measure on WA-5A. It is also possible to manually inject samples directly through an airtight syringe.

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Heating and Gasification Device for Liquefied Petroleum Gas Cylinders

FDFDFD'> When used independently, WA-5A can be directly connected to Tedlar sampling bags to automatically extract gaseous samples from inside, and connected to gas flow meters for measuring the sampling volume. The sample was collected using a two-stage gold amalgam and then detected using WA-5A. It is also possible to manually inject samples using an airtight syringe.

FDFDFD'>When WA-5A is used independently, it can be connected to the LP-WA liquefied gas gasification device to directly collect the compressed gaseous sample in the steel cylinder into the sampling tube, and measure the volume of the sample taken with a gas flowmeter. measureThe samples were desorbed in the sampling tube and the 2nd grade gold amalgam tube in sequence, and then detected using WA-5. It is also possible to manually inject samples using an airtight syringe.

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Other configurations

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MB-1 Mercury Calibration Gas Box PS-4 rechargeable sample pump

S-MA Manual Attachment (20ml) M-160 Mercury Collection Tube

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