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DEPARTMENT OF COMMERCE

HERBERT HOOVER, SECRETARY

BUREAU OF MINES
SCOTT TURNER, DIRECTOR

SAMPLING AND EXAMINATION
OF MINE GASES AND NATURAL GAS

A REVISION OF BULLETIN 42

BY

GEORGE A. BURRELL AND FRANK M. SEIBERT

REVISED BY G. W. JONES

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1926

Library

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CONTENTS

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Analysis of mine atmospheres—Continued.

Modified Haldane apparatus Continued.

Determination of combustible gas.

Calculations for determining combustibles.

Methane and carbon monoxide_.

Methane and hydrogen..

Hydrogen and carbon monoxide--------

Hydrogen, methane, and carbon monoxide.

Calculation of results_--------

Ratio of black damp to air-----

Precautions in manipulation of apparatus_

Mercury--

Necessity for moisture---

Capillary manifold..

Temperature of burette jacket---

Checking the apparatus_-

Effect of drafts--------

Corrections for water vapor-----

Cleaning the apparatus_-

Attention to stopcocks-----

Apparatus for determination of methane in mine air.

Gas detector------------

Verifying safety-lamp tests ---

Haldane apparatus for precise analysis of methane--

Portable apparatus for the determination of methane in mine air----

Use of a storage battery or resistance bank---------

Portable apparatus for the determination of carbon dioxide and

methane---------

Simple portable gas-analysis apparatus for complete analysis of

mine air

Apparatus-------------

Measurement----

Determination of carbon dioxide_-

Determination of oxygen---

Determination of carbon monoxide..

Combustion.-

Precautions_---

Copper oxide apparatus for complete analysis of ga

Advantages of apparatus-----

Reasons for discarding the explosion pipette

Description of apparatus.------

Burette---------------------------------------

Slow-combustion pipette-------

Copper oxide tube and manifold --

Electric heater-

Operating procedure--.

Testing apparatus for tightness---

Measuring the sample_-

Carbon dioxide---

Unsaturated hydrocarbons or illuminants

Oxygen-

Carbon monoxide and hydrogen----

Methane and ethane-------

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Analysis of mine atmospheres—Continued.

Copper oxide apparatus for complete analysis of gases—Continued.

Notes on operation of apparatus.--

----

Use of water in burette and combustion pipette----

Solubility of gases in absorbents ----

Solubility of methane and ethane in fuming sulphuric acid and

cuprous chloride solution---

Action of fuming sulphuric acid on Pittsburgh natural gas---

Elimination of errors due to physical absorption_.

Graduation of the burette-

Capillary error of the apparatus-----

Formation of oxides of nitrogen.-

Distillation of mercury----

Description of mercury still.

Description of still with electric heater---.

Electric heater----

Care of apparatus---

Laboratory container for holding gases over mercury-

Simplified apparatus for determining carbon monoxide..

Description of apparatus__

Iodine pentoxide apparatus using liquid air--------

Determination of carbon monoxide by the pyrotannic acid method.

Apparatus necessary for test.

Procedure for testing for carbon monoxide_

Sampling the gas---

Analysis.

Corrections_---

Detection of carbon monoxide in mines_

Use of birds in mines and the laboratory-----

Determination of oxides of nitrogen in mine air.-

Nitron method--------

Phenol-disulphonic acid method.--

Procedure

Reagents for determination_

Phenol-disulphonic acid.-

Standard nitrate solution -

Ammonia solution --

Caustic soda solution -----

Hydrogen peroxide-------

Use of the gas interferometer--

Description of laboratory type--

Calibration of instrument.

Results from use of the instrument--------

Effect of lowering oxygen content of mixtures analyzed-------

Conclusions regarding the interferometer.

Apparatus for analyzing natural gas_-

Constituents of natural gas_----

Method of sampling-----

Simplified apparatus used in analyzing natural gas_

Procedure of analysis----

Combustion analysis--

Precautions -

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