Accession Number : ADA298131

Title :   Analysis of Volatile Contaminants in U.S. Navy Fleet Soda Lime.

Descriptive Note : Technical rept. Aug 92-May 95,

Corporate Author : NAVAL MEDICAL RESEARCH INST BETHESDA MD

Personal Author(s) : Lillo, R. S. ; Ruby, R. ; Gummin, D. D. ; Porter, W. R. ; Caldwell, J. M.

PDF Url : ADA298131

Report Date : JUN 1995

Pagination or Media Count : 57

Abstract : Contamination was suspected of U.S. Navy Fleet soda lime (High Performance Sodasorb(R) when an ammonia-like odor was reported during its use in August 1992. This material contained indicator dye and was used for carbon dioxide absorption during diving. This incident had a major impact on the U.S Navy diving program when the Navy temporarily banned use of Sodasorb(R) and authorized Sofnolime(R) as an interim replacement. The Naval Medical Research Institute was immediately assigned to investigate. Testing involved sampling from the headspace (gas space) inside closed buckets and from an apparatus simulating conditions during operational diving. Volatile organic compounds were analyzed by gas chromatography and mass spectrometry; ammonia and amines were measured by infrared spectroscopy. Significant amounts of ammonia (up to 30 ppm), ethyl and diethyl amines (up to several ppm), and various aliphatic hydrocarbons (up to 60 ppm) were detected during testing of both Sodasorb(R) and Sofnolime(R). Contaminants were slowly removed by gas flow and did not return. The source(s) of the ammonia and amines are unknown, although they may result from the breakdown of the indicator dye. Hydrocarbon contamination appeared to result from the materials of which the bucket is constructed. Based on these findings, the U.S. Navy is expected to phase in non-indicating soda lime that will be required to meet defined contaminant limits. jg p.3

Descriptors :   *CONTAMINANTS, *FLEETS(SHIPS), *VOLATILITY, INFRARED SPECTROSCOPY, MATERIALS, COMPOSITE MATERIALS, SODIUM, AMMONIA, AMINES, HYDROCARBONS, SAMPLING, ORGANIC COMPOUNDS, NAVAL RESEARCH, DYES, ABSORPTION, CONTAMINATION, CARBON DIOXIDE, MEDICAL RESEARCH, INDICATORS, DIVING, HYDROXIDES, POTASSIUM, GAS CHROMATOGRAPHY, ETHYL RADICALS, ALIPHATIC HYDROCARBONS, GAS FLOW, CALCIUM OXIDES, MASS SPECTROMETRY.

Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Marine Engineering
      Environmental Health and Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE