What is Py-GC (Pyrolysis Gas Chromatography)

is a method of chemical analysis in which organic material is heated and thermochemically decomposed without participation of oxygen to produce smaller molecules that are separated by gas chromatography and detected using mass spectrometry.

Py-GC has been well used especially characterization of polymer sample, as well as for polymer quantitative and qualitative analysis, structural analysis in detailed point and thermal stability analysis.

Curie point Pyrolyzer uses pulse heating method applied with induction heating and curie point of ferromagnetic properties.

When ferromagnetic properties receive induction heating, it loses its magnetic properties and reaches up to its curie point temperature in an instant. JAI has developed 21 kinds of pyrofoil for 21 different temperatures with alloy as heat source and each pyrofoil has only one curie point temperature and they are highly stable.

Curie Point Pyrolyzer

1.Rapid heating (within 0.2sec) to any target temperature and high reproducibility (±0.1℃).
2.Rapid heating prevents from secondary reaction and decomposition.
3.Easy to decompose poorly soluble compound.
4.Developed 21 temperatures from 160℃ to 1040℃.
5.Able to use with any GC from any manufacturer.

■Thermal decomposition temperature – time curve
Sample heating is very rapid and reaches to equilibrium temperature within 0.2 second.
Equilibrium temperature is very accurate and stable at ±0.1℃.
Thermal decomposition time is able to be decided with timer

Tempature change for Curie Point pyrolyzer VS Fyrnase pyrolyzer

Pyrogram of Polyethylene
(click kakudai..gif)

Pyrofoil 740℃ able to detect HDPE (n-C80)

Since the maintenance oven can be set at a higher temperature (400°C ), higher molecular weight of the pyrolyzates can be analyzed.
The pyrogram on the left was obtained from pyrolysis of polyethylene at 740°C for 5 sec. The pyrogram shows parafiin and olefin peaks of carbon number up to 80 as pyrolyzates.

Pyrogram of Polystyrene
(click kakudai..gif)

Pyrofoil 590℃ able to detect 4 peaks at tetramer and pentamer

The pyrogram shown on the left was obtained from polystyrene pyrolyzed at 590°C for 5 sec.
4 peaks of tetramer of styrene are clearly detected. ' Also, pentamer peaks were observed which are normally difficult when using a standard capillary column.

Japan Analytical Industry Co., Ltd.
208 Musashi, Mizuho, Nishitama Tokyo 190-1213 Japan
TEL +81-42-557-2331 FAX +81-42-557-1892