Atmospheric mercury analyzer (AAS)
Dual gold amalgamation system, suitable for the measurement of mercury in air and gaseous matrices by CVAAS
Ultra high-sensitivity mercury analysis in air by newly developed optical system
The WA-5A is atmospheric mercury analyzer that can be connected to the automatic sample changer (TC-WA) dedicated to mercury collector tubes.
Based on the double-amalgamation method of the previous model, its design was totally renewed. The WA-5A is equipped with not only high-performance options which enable measurement of environment air and various gases (LPG/LNG, flue gas, etc.) in various matrices, but also a newly developed optical system as standard so that it can prevent loss of precious samples, thus, you can measure from low to high concentrations while the equipment automatically sets the measurement range.
The sample gas is collected into the mercury collector tube, and the tube is placed in the heating furnace of the WA-5A to start measuring. Mercury vaporized due to high temperature heating is scrubbed and dehumidified. Then, the mercury is collected as gold amalgam in the mercury collector tube for re-purification. This tube is re-heated to obtain atomic mercury of which concentration is measured by atomic absorption spectroscopy.
Also, you can directly inject the sample using a gas-tight syringe.
Newly developed technology
By adopting newly developed technology, new functions are added to this model.
- The automatic sample changer dedicated to mercury collector tubes (for 30 samples) makes analysis efficient.
- By using a new optical system, you can measure from low to high concentrations (up to 1,000 ng) while the equipment automatically sets the measurement range.
- Detection lower limit of 1 pg is achieved.
- There is no need to prepare special gas or high pressure cylinders. (Ambient indoor air is purified and used as carrier gas, so the economical efficiency and safety are ensured.)
- You can measure samples directly from Tedlar® Bags or high pressure gas cylinders.
In accordance with “Manual for hazardous air pollutants measuring method” in Japan
This equipment complies with “How to measure mercury in the atmosphere” in the “Manual for Hazardous Air Pollutants Measuring Method” established by the Ministry of the Environment. It simply and quickly measures gas-borne mercury in the form of gold amalgam collected in the mercury collector tube.
|Mercury collector furnance part||Scrubber and Dehumidifier||Electronic (Peltier) Cooling|
|Mercury collector furnance||Heat up to 700°C|
|Filter (1)||Gold filter|
|Filter (2)||Activated carbon filter|
|Pump||Diaphragm Air Pump|
|Flow rate||0.1~1.0L/min (Adjustable)|
|Detector part||Principle||Atomic Absorption Spectroscopy (Dual-Cell Auto Range)|
|Light source||Low pressure Mercury discharge lamp|
|Carrier Gas||Ambient (Purified) Air|
|Detection Limit||0.001ng (1pg)|
|Display||Peak wave shape, Calibration curve, Measuring condition, Measuring results, Error message etc|
|Power supply||AC100~240V±5%, 50/60Hz, 170VA|
|Installation dimensions||W230 x D460 x H390 (WA-5 unit only)|
|Weight||13 kg (WA-5 unit only)|
Applications, Test methods
|Gas analysis||Ambient air, Working environment air, Fuel gas, Natural Gas, Shale Gas, LPG and more.||ASTM D 5954-98; ISO 6978, ISO 20552,|
JLPGA-S-07, Manual method of measuring hazardous air pollutants.
|Reduction vaporization||Drinking Water, River water, Sea Water, Waste water, Digested Liquid and more.||USEPA 245.1, 245.2, 245.5, 7470A, 7471B, ASTM D 3223-02, EN 1483; APHA 3112, JIS K0102.|
Model TC-WA Auto tube changer (30positions)
WA-5A or 5F can be coupled with TC-WA 30-positions tube autosampler. Sampling tubes are set in TC-WA for unmanned fully automated tube desorption, 2nd-amalgamation and measurement on WA-5. Manual direct injection via gas-tight syringe is also possible.
|Applications||Mercury in Atmospheric Air, Exhaust Gas, Natural Gas, Shale Gas, Hydrocarbon Gas, LPG/LNG, Hydrogen Gas and more|
|Test methods||AAS:||ASTM 5954, ISO 6978, ISO 20552, JLPGA-S-07 & etc.|
|AFS:||ASTM 6350, ISO 6978, JLPGA-S-07, ISO 20552, USEPA IO-5 & etc|
Heated Vaporizer for LPG Cylinder
WA-5A or 5F standalone can be setup to operate with auto-sampling of gaseous hydrocarbon samples from Tedlar Bags input with Gas Volume Meter measuring the sampling volumes. Samples are collected as dual-gold amalgamation before measured on WA-5. Direct injection via gas-tight syringe is also possible.
WA-5A or 5F standalone can be coupled with LP-WA Liqueﬁed Gas Vaporizer to directly collect the compressed gaseous hydrocarbon sample in the cylinder onto the gold-amalgamation sampling tube, with the gas volume measured by a Gas Volume Meter. Collected sample is sequentially auto-desorb to transfer to 2nd-gold amalgamation before measured on WA-5. Direct injection via gas-tight syringe is also possible.
|Applications||Mercury in Natural Gas, Shale Gas, Hydrocarbon Gas, LPG/LNG, Hydrogen Gas and more|
|Test methods||AAS:||ASTM 5954, ISO 6978, JLPGA-S-07 & etc.|
|AFS:||ASTM 6350, ISO 6978, JLPGA-S-07 & etc.|
Mercury Vapor Calibration Box
Re-Chargeable Sampling Pump
Manual attachment (20mL)
Mercury Collector Tube