Vapor monitor, organic

Analytical Desorption Recovery. Spiking with known amounts of JP-4 and PD-680 was done in two ways. First, known amounts were injected into the center of the front portion of the charcoal tube (SKC, NIOSH approved charcoal tubes). Secondly, the vapor monitors (3M 3500 organic vapor monitors) were spiked by injecting known amounts through the center elutriation port of the monitor cap, onto a piece of filter paper placed between the elutriation cap and the diffusion plate of the vapor monitor (2). The filter paper was removed after 24 hours and analyzed Tor any unvaporized portion. The monitor was analyzed as described earlier. The spiking was done at three levels, roughly corresponding to 0.5X, 1.0X, and 2.OX the occupational standard of these hydrocarbons, for a 10 liter air volume. 

Determination of Desorption Efficiencies in the 3M 3500 Organic Vapor Monitor," presented at American Industrial Hygiene Conference, Houston, Texas, May 20, 1980. 

A second product, the Organic Vapor Monitor, was introduced to the market in January of 1978. An additional patent on personal exposure monitoring was issued in July of 1978. 

The clip is simply attached, the start time recorded on the designated location on the rear of the monitor, and the Organic Vapor Monitor is placed in the breathing zone. 

Comparative results with tubes were obtained for several components of the gasoline mixture. These results were quantified by preparing calibration standards for each component. In each case, results from the 3M Organic Vapor Monitor more closely match the test concentration and has a better standard deviation in all instances. This data can be found in Table I. 

Of more practical concern are some examples of field test data obtained with the 3M Organic Vapor Monitor. In addition to the examples given below, many other comparative studies, performed both in the laboratory and in the field, by companies and agencies other than 3M are available. Copies may be obtained from 3M upon request. 

Takada, et. al. (7), compared the 3M Organic Vapor Monitor to charcoal tubes by studying the weight of contaminant collected as a function of (1) exposure time at various concentrations and (2) chamber concentration at various exposure times. Their data is summarized in Figures 1,2,3,4. Their study led to the following major conclusions ... 

Figure 1. Relationship between weight of toluene collected by the 3M Organic Vapor Monitor and its exposure time...

Abcor "Gasbadge" organic vapor samplers and 3M 3500 Organic Vapor Monitors were purchased for use in this study. Abcor badges were loaded prior to each field trip in an office environment. Standard SKC charcoal tubes (100 mg collection section with 50 mg backup) were used, with DuPont P-200 pumps calibrated prior to each survey. 

Figure 4. 3M Organic vapor monitor data vs. corresponding tube/pump data...

Boeniger, M.F., Zaebst, D.D., Ludwig, H.R., Crandall, M.S., and Vongrongseman, P., A Field Comparison of Two Passive Organic Vapor Monitors with Charcoal Tubes Under Singular and Multiple Exposure Conditions, Unpublished paper, presented at 1980 American Industrial Hygiene Conference. 

M Brand Organic Vapor Monitor Product Information and Usage Guide, 3M Company, St Paul, MN. 

Mannino DM, Schreiber J, Aldous K, et al. 1995. Human exposure to volatile organic compounds a comparison of organic vapor monitoring badge levels with blood levels. Int Arch Occup Environ Health 67 59-64. 

ORSA 5 sampler (tube-type diffusive sampler) 400 mg of activated charcoal contained in a 0.5 cm diffusive path and 0.88 cm cross sectional area sampler OVM 500 sampler (batch-type diffusive sampler) 180 mg of activated charcoal contained in a 1 cm diffusive path and 7.07 cm cross sectional area sampler 3 M organic vapor monitor 3500 [OVM]... 

Voelte, D. R., Weir, F. W. A Dynamic Flow Chamber Comparison of Three Passive Organic Vapor Monitors with Charcoal Tubes Under Single and Multiple Solvent Exposure Conditions, Am. Ind. Hyg. Assoc. J. 42, 845 (1981)... 

Objective 1 was accomplished by the use of NIOSH approved for carbon tetrachloride 3M Brand 3500 Organic Vapor Monitors. These were chosen because of their simplicity of design, lack of interference for the worker being monitored, cost, and ease of analysis. These... 

The MSA Passport II Organic Vapor Monitor is a handheld portable detector utilizes 10.6 eV UV lamp tor photo-ionization ionization. 

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