Wind effects on personal dust samplers

Chung, K. Y. K.; Ogden, T. L.; Vaughan, N.P.

doi:10.1016/0021-8502(87)90053-x

Cited by 20 publications

(12 citation statements)

References 7 publications

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“…The overall sampling efficiency of an aerosol sampler will clearly be sensitive to wind speed (Chung et al, 1987;Kalatoor et al, 1995) and, indeed, our results confirmed a reduction of the detected CFU with increasing wind speed, whatever device is used in the sampler. This means that an air intake flow rate of 20 litres per minute is perhaps not high enough to avoid air turbulence affecting the sampling.…”

Section: Discussionsupporting

confidence: 86%

Two sampling methods for the Petri dish detection of airborne fungi

Fernández-Rodríguez

Molina

Palacios

et al. 2011

Grana

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Section: Discussionsupporting

confidence: 86%

Two sampling methods for the Petri dish detection of airborne fungi

Fernández-Rodríguez

Molina

Palacios

et al. 2011

Grana

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“…The process of abatement, including the size and configuration of the abatement area, work practices, and engineering control methods, has been suggested to be important regarding any observed relationship between area and personal samples [35,63]. Personal work habits, location of negative air filtration, air movement, cleanup, HEPA vacuuming efficiency and frequency, and use of wet methods have been suggested to greatly influence exposure concentrations [19,35,48,51,101,102] and subsequent method comparisons [35]. Since data reported in this investigation are matched, issues of workers leaving the general location, episodic releases, continuous operation of area samples at a fixed location, and related workplace practices are somewhat minimised.…”

Section: Discussionmentioning

confidence: 99%

A Statistical Evaluation of Asbestos Air Concentrations

Lange¹

1999

Indoor Built Environ

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Both area and personal air samples collected during an asbestos abatement project were matched and statistically analysed. Among the many parameters studied were fibre concentrations and their variability. Mean values for area and personal samples were 0.005 and 0.024 f·cm^–3 of air, respectively. Summary values for area and personal samples suggest that exposures are low with no single exposure value exceeding the current OSHA TWA value of 0.1 f·cm^–3 of air. Within- and between-worker analysis suggests that these data are homogeneous. Comparison of within- and between-worker values suggests that the exposure source and variability for abatement are more related to the process than individual practices. This supports the importance of control measures for abatement. Study results also suggest that area and personal samples are not statistically related, that is, there is no association observed for these two sampling methods when data are analysed by correlation or regression analysis. Personal samples were statistically higher in concentration than area samples. Area sampling cannot be used as a surrogate exposure index for asbestos abatement workers.

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“…Testing of personal aerosol samplers for inhalable dust has involved manikin-mounted samplers in a wind tunnel or in the work environment to simulate samplers worn on a worker (Botham et al 1991;Chung et al 1992;Chung et al 1987;Kenny et al 1997;Mark and Vincent 1987). To understand the mechanisms affecting personal sampler performance, it is desirable to make measurements of both the air ow around the samplers mounted on the manikin and the sampling ef ciency of the samplers.…”

Section: Introductionmentioning

confidence: 99%

Development of a Large Particle Aerosol Distribution System for Testing Manikin-Mounted Samplers

Smith¹,

Bartley²,

Watkins³

1999

Aerosol Science and Technology

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ABSTRACT. Personal samplers used to determine the inhalable fraction of workplace dust are tested while mounted on a manikin, which simulates a worker. To understand the mechanisms affecting the performance of such samplers, researchers must measure the air ow around the body where the samplers are mounted. Therefore, wind tunnel facilities to determine both air ow conditions around samplers and sampling ef ciency are needed.A wind tunnel system was developed that was large enough to accommodate the top half of a life-sized manikin and employed a laser Doppler velocimeter for velocity measurements around the manikin. For generating particles up to 70 m m, an aerosol generation system, using a two-dimensional scanning system to cover an extended area, was developed and tested. The generation system had carriages with linear bearings mounted on rod assemblies for scanning in the horizontal and vertical directions. Screw drives, powered by stepper motors under computer control, moved the carriages in a preprogrammed pattern. The generation system was characterized for its ability to generate uniform concentrations of aerosols over an extended area at wind speeds of 0.5 and 2 m/s and particle sizes of 7 and 70 m m. Uniformity of concentration over the area studied, in the absence of the manikin, was 10% relative standard deviation (RSD) or better, except for 7 m m particles at a wind speed of 0.5 m/s where some nonuniformity was observed. The uniformity under these conditions was improved by rearranging the distances between components in the wind tunnel.

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Wind effects on personal dust samplers

Cited by 20 publications

References 7 publications

Two sampling methods for the Petri dish detection of airborne fungi

Two sampling methods for the Petri dish detection of airborne fungi

A Statistical Evaluation of Asbestos Air Concentrations

Development of a Large Particle Aerosol Distribution System for Testing Manikin-Mounted Samplers

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