General Catalogue Chemistry - BECO Internacional LTDA.

analysis methods
Butane gas analysis by thermal decomposition
667 400
667 400
Combustion chamber
for quantitative synthesis of water
667 403
A capillary tube is used to direct the hydrogen
to the arc, where it burns in the atmosphere.
The gases used here are introduced into the
reaction vessel under slight pressure by means
of gas syringes, thus permitting quantitative
analyses. The water created here condenses
on the chamber wall and is clearly visible. The
combustion chamber itself is so light in weight
as to allow for gravimetric determination of its
mass. When 50 ml of H 2 and 25 ml of O 2 are
consumed one can detect an increase in
weight of exactly 20.0 mg (at standard temperature
and pressure).
Application examples
· Synthesis of water from the constituent elements
(continuous combustion, the inverse of
water electrolysis)
· Synthesis of HCI from the constituent elements
667 403
74 LEYBOLD DIDACTIC · GENERAL CATALOGUE CHEMISTRY
Equipment list
Combustion chamber with incandescent wire
The chamber is equipped with a platinum filament
which is heated electrically to the point at
which it glows. The chamber is connected by
two GL 18 screw thread connectors to two
gas syringes from which the gases are introduced
under slight pressure. The electrical heating
of the platinum coil allows for simple, nonhazardous
generation of elevated temperatures.
Reverse reactions are largely inhibited
since the area inside the combustion chamber
itself remains cold.
Application examples
· Dissociation of butane into its constituent elements
· Elementary organic analysis and detection of
oxygen in organic compounds, using dimethyl
ether as an example
· Model experiments for a thermal conductivity
detector
Butane gas analysis by thermal decomposition
Combustion chambers
All the combustion chambers supplied by
LEYBOLD DIDACTIC are made of glass. They
have GL 18 screw thread connectors at both ends
for connecting gas syringes. The platinum wires,
fused into the glass, are given additional protection
against detachment with the lateral supports.
The entire course of the experiment remains
transparent -in the truest sense of the word
Advantages:
· Quick and easy setup on the laboratory stand
· Quantitative statements regarding
volumetric ratios are possible
· Non-corroding platinum electrodes and coils
· Platinum pins cannot break away from
their attachments
Quantity Description Cat. No.
1 Combustion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667 403
1 Gas syringe, 100 ml . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665 912
1 Gas syringe with 3-way stopcock,100 ml . . . . . . . . . . . . . . 665 914
2 Gas syringe holder 100 ml . . . . . . . . . . . . . . . . . . . . . . . . . . 665 918
1 Variable extra low voltage transformer D . . . . . . . . . . . . . . . 667 827
1 Pair of cables, 1 m, red and blue . . . . . . . . . . . . . . . . . . . . 501 46
2 Set of 6 croc-clips, polished. . . . . . . . . . . . . . . . . . . . . . . . . 501 861
1 MINICAN gas can: n-Butane . . . . . . . . . . . . . . . . . . . . . . . . 660 989
1 Fine regulating valve MINICAN for gas cans. . . . . . . . . . . . . 660 980
1 Submerged-coil manometer after Schiele . . . . . . . . . . . . . . 665 936
1 Base rail, 95 cm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 603
2 Stand tube, 450 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 609
2 Universal bosshead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 615
4 Bosshead S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301 09
1 Universal clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 555
1 Universal clamp, 0 ... 120 mm . . . . . . . . . . . . . . . . . . . . . . . 301 72
1 PVC tubing, 5 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667 191
667 818
Spark gap supply unit
Current-limited to 2 mA, thus no contact
hazard according to VDE 0105; for generating
a brief ignition spark or a constant spark gap
with contact-safe high-voltage sockets and
additional ground socket.
Mains connection: 230 V, 50 Hz
Output: DC, approx. 10,000 V/2.0 mA
Dimensions: 20 x 14 x 23 cm
Weight: 3.0 kg
Scope of delivery
1 Pair of connecting leads 50 cm,
1 Pair tapping terminals,
1 Power lead.