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Instruction Manual: Thermal Vaporization Mercury Analyzer MA-3
Solo
NIC-TD-0000090-15
6
Nippon Instruments Corporation
2.2.
Principle of Measurement
A sample is heated in the H1 (sample heater), and the mercury compound in the
sample is made to evaporate. Then, the catalyst furnace (H2) decomposes a mercury
compound in gas, removes interfering components and atomizes mercury.
The interfering components are removed by managing the mercury collector tube to an
appropriate temperature using the H3, and the collection concentration is carried out
selectively for the mercury gas as gold amalgam.
After the completion of the sample heating decomposition sequence, the mercury
collector tube is heated, mercury is separated again as metal mercury gas and is led to
the detection unit (absorption cell), and the absorbance at 253.7 nm, which is the first
absorption wavelength band of mercury, is measured.
Heater H3
(Mercury Collector Tube
Heating Furnace)
Mercury
Collector Tube
Heater H2
(Catalyst Furnace)
Heater H1
(Sample Heating Furnace)
Heater H4
Detector
Absorption
Cell
Lamp
Detector
Drain Bottle
Humidifica-
tion Bottle
Needle Valve
Air Pump Flow Sensor
Activated
Carbon Filter
Activated Carbon Filter
Nafion Tube
Exhaust
Air
Filter Unit
Содержание MA-3 Solo
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