Draeger Tube

Detection in the field M18A2, and Draeger Tube Organic Arsenic Compounds and Arsine. 

Detection in the field M18A2, M256, M256A1, M8 and M8A1 alarms, M8 and M9 paper, and Draeger Tube Phosphoric Acid Ester 0.05/a... 

The dilution to threshold was before 3604 and after 232, reduction 94%. The ammonia was before 5 ppm and after 0, 3 ppm, reduction 94%, measured with Draeger tubes. The pressure drop over the biobed of the mixture of vibrous peat and heather was 5mm WK. In the tube between the breeding house and the biobed there is a sackfilter installed to remove sawdust, that otherwise should clog the under layer of the bed. 

Elemental composition H 5.92%, S 94.08. Hydrogen sulfide may be distinguished by its characteristic odor. The gas turns a paper soaked in lead acetate solution black. Many infrared sensors are commercially available for in-situ measurements of H2S. It may be monitored semiquantitatively by Draeger tubes. It also may be analyzed by GC following trapping over molecular sieves and thermal desorption. Either a flame photometric detector or a sulfur chemiluminescence detector may be used for GC analysis. It may be separated on a capillary column such as Carboxen 1006 PLOT or SPB-1 SULFUR (Supelco Catalog 1999 Supelco Inc., BeUefonte, PA). 

The subcommittee did not find information on the effects of hyperbaric conditions on Draeger-tube (tubes that measure concentrations of specific gases) measurements and recommends that research be conducted to determine the effect of increased pressure on Draeger-tube measurements. The results of that... 

The subcommittee s recommended SEALs are for an atmospheric pressure of 1 at 25°C Values obtained for the gases using Draeger tubes or other measurement devices in a disabled submarine might need to be corrected to an atmospheric pressure of 1 and 25°C. 

The subcommittee recommends that the Navy give high priority to the development of battery-operated instruments that are more accurate than Draeger tubes for measuring concentrations of the gaseous contaminants. 

In a disabled submarine, temperatures will likely be colder and atmospheric pressures higher than the normal atmospheric conditions used for studies from which SEALs were developed. The subcommittee emphasizes that its recommendations for SEALs are for an atmospheric pressure of 1 and a temperature of 25 °C. Corrections for altered temperature and pressure will need to be made. If the pressure increases in the disabled submarine, the SEAL values should be reduced in inverse proportion to the pressure increase. The subcommittee did not find information on the effects of hyperbaric conditions on Draeger-tube measurements. Values obtained for the gases using Draeger tubes in a disabled submarine might need to be corrected to an atmospheric pressure of 1 and 25°C. 

Survey the following gases with Draeger tubes ( indicates respiratory irritant) ... 

E. Because Draeger tubes are not precise and not all gases can be measured, survivors may experience respiratory or nervous symptoms if SEAL 1 has not been exceeded. If the symptoms are severe, such as uncomfortable coughing, wheezing, shortness of breath, severe headache, or streaming eyes, place those so affected on EABs. Each hour, those on EABs should try breathing the submarine atmosphere and only return to EABs if severe symptoms return. AT ANY TIME, IF MORE THAN 30% OF SURVIVORS ARE ON EABs, PROCEED AS IF SEAL 2 HAS BEEN EXCEEDED. 

F. If SEAL 1 has not been exceeded, and fewer than 30% of the survivors are on EABs, repeat the toxic gas survey each 24 hours for as long as sufficient Draeger tubes remain. 

Material 2 syringes, quartz reaction tube, two burners, gas tracing instrument (Draeger tubes for CO), small beakers carbon pieces, glass wool, carbon dioxide (lecture bottle), limewater. 

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