OTHER GAS ANALYSIS INSTRUMENTS
[ Burrell Scientific Storefront
][ Featured Products
]
[ How to Reach Us][About Us]
|
|
Burrell Scientific OTHER GAS ANALYSIS INSTRUMENTS [ Burrell Scientific Storefront
][ Featured Products
] |
Gas Analysis in Brief
In analyzing a gas mixture by absorption and oxidation methods, the components of the mixture are determined by a systematic measurement of changes in gas volume. The volume changes are effected by the successive removal of certain components by treatment with selective liquid absorbing reagents and by reacting the combustible components with oxygen.
Absorption and oxidation techniques are applied in large part to mixtures containing some or all of the following components:
| Gases determined by Absorption | Gases determined by Oxidation | Gases determined by Difference |
| Carbon Dioxide | Hydrogen | Nitrogen |
| Oxygen | Methane | |
| Illuminants | Ethane | |
| Carbon Monoxide | Carbon Monoxide |
Products of Oxidation include carbon dioxide and water vapor. The latter condenses and the volume of the gas sample contracts proportionately. The carbon dioxide and the contraction are measurable and the values are used in percentage calculating formulas.
Absorptions are carried out in either contact pipettes or in bubbler pipettes and the decrease in gas volume as the absorptions are successively made is a direct measure of the volume of the particular component present.
Oxidation is accomplished by means of catalyst and copper oxide tubes. The combination permits the separation of all combustible components since methane and ethane are burned in the catalyst tube and hydrogen or hydrogen and carbon monoxide in the copper oxide tube.
With the catalyst tube alone the following separations may be made:
Methane and ethane
Total Hydrocarbons and hydrogen
Total Hydrocarbons and carbon monoxide
Carbon monoxide and hydrogen
Usually it is preferable to determine carbon monoxide
by absorption, using the catalyst for hydrocarbons and hydrogen. When it
is necessary to separate methane and ethane with hydrogen present the copper
oxide tube is used for the latter. (In this case carbon monoxide may be
determined along with hydrogen)
Methods and techniques are fully discussed in the Burrell Manual for Gas Analysis included with each instrument.
SELECTION OF APPARATUS
Apparatus for the analysis of gases by absorption and combustion methods are divided into two general types, Laboratory and Portable. Generally , Laboratory Models are more precise, while portable models are smaller more compact and easier to manipulate.
Knowing the general character of the gas mixture or mixtures to be analyzed and the degree of accuracy required, a selection can be made from our standard instruments. If, however, the standard assemblies are not suitable for you application -- the Burrell Build-Up™ design offers a simple medium for grouping any particular assortment of glassware and accessories that will suit your requirements.
Flue Gas Analyzers: Cabinet Models
The Flue Gas Analyzers are designed especially for the analysis of flue or stack gases, but may be used wherever three gaseous components are to be determined by absorption. Each unit is equipped with three full-sized absorption pipettes and a 100 ml. burette; and is generally used to determine carbon dioxide, oxygen, and carbon monoxide. When it is necessary to analyze for hydrogen and hydrocarbons, Junior models are recommended.
The Cabinet models have removable front
and rear panels and a large, comfortable, leather handle.
With the panels removed the glassware is is in front of
the case, not obscured by sides and top.
39-503
Flue Gas Cabinet Model VR
-- Burrell Gas Apparatus.
Supplied with 3 ea -
40-130 Burrell contact pipettes, 1 ea- 39-990 gas
measuring burette, 1 ea -
39-810-10C flushing manifold, all mounted in the
Burrell wood carrying
case. Without solutions.
39-507
Flue Gas Cabinet Model VRS --
Burrell Gas Analysis Apparatus
Supplied with 2 ea -
40-105-10 BeTe Auto-Bubbler pipettes, 1 ea -40-130
Burrell Contact pipette, 1 ea - 39-990
gas measuring burette and 1 ea -
39-810-10C flushing manifold, all mounted in the
Burrell wood carrying
case. Without solutions.
39-540
Flue Gas Allied Model - Burrell
Gas Analysis Apparatus
Mounted in a wood carrying
case. This compact analyzer - is an efficient
instrument for flue gas analysis and
similar purposes. Supplied with 3 ea -
40-130 Burrell Contact pipettes, 1 ea - 40-010 gas
measuring burette and
1 ea - 39-880 non-flushing manifold. Without
solutions.
Gas
Purity Testers: Cabinet Models
Burrell Gas Purity Testers are designed to
determine impurities in oxygen and hydrogen. Supplied with No. 40-000 gas
burette (100ml capacity with a 94 ml. ungraduated, center positioned bulb, the
upper and lower stems of 3 ml. capacity each are graduated in .04 ml.) and the
absorption or combustion assembly suited to the gas to be analyzed.
Electrolytic hydrogen may contain oxygen as an impurity
and electrolytic oxygen may contain hydrogen. Nitrogen will be the
principal contaminant of Oxygen produced form liquid air.
Hydrogen - In testing hydrogen for oxygen, a
rapid method is to use Model VE, wherein the sample is passed into a Burrell
Auto-Bubbler pipette, filled with Oxsorbent.
Also, the same test may be made using Model VO,
wherein the sample is passed through the catalyst tube, which will cause any
oxygen present to combine with its molecular equivalent of hydrogen. The
percentage of oxygen is calculated from the volume reduction of the sample.
Oxygen - Liquid air oxygen may be tested by
absorbing all of the oxygen in ammoniacal copper solution, using Model VG.
Any residual gas is assumed to be Nitrogen.
Electrolytic oxygen, which may contain hydrogen, is
tested with Model VO. Here, the sample is passed through the catalyst tube
where any hydrogen combines with oxygen. The reaction results in a
contraction in the volume of the sample. From the amount of the
contraction, the percentage of hydrogen is calculated.
Oxygen and Hydrogen - Model VP combines all the
equipment in one apparatus for testing liquid air oxygen and electrolytic
hydrogen and oxygen.
There is a large capacity pipette for ammoniacal copper
solution, for determining the purity of liquid air oxygen; a Burrell
Auto-Bubbler for electrolytic hydrogen; and a Perma-Therm II catalytic assembly
for hydrogen or oxygen.
39-556
Gas Purity Tester Model
VE - For determining small amounts of oxygen in electrolytic hydrogen.
Supplied with No.
40-000 purity burette and No. 40-105 Burrell Auto-Bubbler pipette.
Mounted
in a wood carrying
case. Without solutions.
39-557
Gas Purity Tester Model
VG - For determining the purity of oxygen produced from liquid
air.
Supplied with No.
40-150 large capacity pipette, filled with copper turnings, and a No.
40-000
purity
burette. Mounted in a wood carrying case. Without solutions.
39-558
Gas Purity Tester Model
VO - For determining the purity of electrolytic oxygen or
hydrogen.
Supplied with No. 40-373
Perma-Therm II (115V) catalytic heater and 40-000 purity burette.
Mounted in a wood
carrying case. Without solutions.
Click Below:
Burrell Scientific Storefront |
Featured Products |
How To Order |
Reach Us |
|
Feedback |