Charcoal tube

Health and Safety. Petroleum and oxygenate formulas are either flammable or combustible. Flammables must be used in facUities that meet requirements for ha2ardous locations. Soak tanks and other equipment used in the removing process must meet Occupational Safety and Health Administration (OSHA) standards for use with flammable Hquids. Adequate ventilation that meets the exposure level for the major ingredient must be attained. The work environment can be monitored by active air sampling and analysis of charcoal tubes. 

Methyl alcohol Charcoal tube method not recom mended. Use silica gel tubes. ... 

These compounds migrate rapidly to the back-up section of the charcoal tube. A 400 mg tube should be used for sample collection with a second 100 mg tube in series behind the large tube to determine breakthrough. 

BS 6069 Vinyl chloride Sulphur dioxide Charcoal tube and gas chromatography... 

Chlorinated hydrocarbon Charcoal tube, solvent desorption... 

Attach the collection device (filter cassette, charcoal tube, etc.) to the shirt collar or as close as practical to the nose and mouth of the employee). Employee exposure is that exposure which would occur if the employee were not using a respirator. The inlet should always be in a downward vertical position to avoid gross contamination. Position the excess tubing so as not to interfere with the work of the employee. 

Prepare a blank(s) during the sample period for each type of sample collected. For any given analysis, one blank will suffice for up to 20 samples collected. These blanks may include opened but unused charcoal tubes, and so forth. 

Charcoal Tubes Reference has been made earlier to adsorption, which is the property of some solid materials, such as activated charcoal, to physically retain solvent vapors on their surfaces. In environmental health testing, the adsorbed vapors are removed, generally with a solvent, in a laboratory. The solvent is then analyzed by physical methods (gas chromatography, etc.) to determine the individual compounds whose vapors, such as benzene, were present in the sampled air. Industrial atmospheric samples can be collected in small glass tubes (4 mm ID) packed with two sections of activated charcoal, separated and retained with fiberglass plugs. To obtain an air sample, the sealed ends of the tube are broken off, and air is drawn through the charcoal at the rate of 1 liter per minute by means... 

The shorter (backup, or second) section of the charcoal tube should be inserted into the sampling line so that the air is drawn through the longer section first. When analyzed, the backup section should be void of solvent vapors - in other words, there should have been no carry-over from the first section. 

Mil)0-Kemi, Charcoal tube Benzene Butanol, Heptane 1-1-Dichloroethylene ... 

H.W. Biermann and T. Barry, Evaluation of Charcoal Tube and SUMM A Canister Recoveries for Methyl Bromide Air Sampling, Report EH 9902, Cahfomia Environmental Protection Agency, Department of Pesticide Regulation, Sacramento, CA (1999). 

Air (particulates and gas) Sequential collection on Teflon filters and charcoal tubes solvent extraction with hexane (filters) and carbon disulfide (charcoal tubes) GC/MS Not specified Not specified Dannecker et al. 1990... 

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