The Real Issue with Wall Deposits in Closed Filter Cassettes—What's the Sample?

Brisson, Michael J.; Archuleta, Melecita M.

doi:10.1080/15459620903261427

Cited by 6 publications

(9 citation statements)

References 31 publications

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“…This is a concern not only for sampling and analysis of lead and other elements but can apply to aerosol sampling in general, and to certain targeted aerosol fractions (i.e., inhalable, respirable, or thoracic). (11,12) Sampling cassettes composed of conductive materials do minimize the internal deposits that occur through static attraction but will not eliminate internal deposits entirely. (2) Losses of collected particulate matter from the filter during sample transport and handling are also possible, regardless of the composition of the sampler.…”

mentioning

confidence: 99%

Analytical Performance Issues

Ashley

Harper²

2013

Journal of Occupational and Environmental Hygiene

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mentioning

confidence: 99%

Analytical Performance Issues

Ashley

Harper²

2013

Journal of Occupational and Environmental Hygiene

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“…In specific metals exposure assessments, the 37-mm cassette is primarily used for sampling beryllium. Oddly enough, the ACGIH TLV for beryllium specifically requires a comparison to the inhalable particle fraction (ACGIH, 2017;Brisson & Archuleta, 2009). It is clear that the 37-mm cassette on its own does not collect the inhalable fraction efficiently, especially without the inclusion of wall deposits.…”

Section: Air Samplingmentioning

confidence: 99%

“…It is clear that the 37-mm cassette on its own does not collect the inhalable fraction efficiently, especially without the inclusion of wall deposits. In contrast, many sites include policies to follow TLV exposure recommendations, those of which for beryllium are set much lower than most other metals (Brisson & Archuleta, 2009). These facts indicate that the 37-mm cassette is not adequate for sampling beryllium, especially not when comparing exposure values to the ACGIH TLV.…”

Section: Air Samplingmentioning

confidence: 99%

“…One study specifically notes the tendency for air samplers to be costly and timeconsuming to clean, on top of documented performance issues (Brisson & Archuleta, 2009). The 37-mm cassette is considered disposable and therefore has a lower price at around $1.00, but, while inexpensive, again, does not meet the inhalable sampling criteria.…”

Section: Air Samplingmentioning

confidence: 99%

“…The Button sampler, however, is not as sensitive to air movement and operates at a slightly higher flow rate of 4 L min -1 . Both the Button and IOM are reusable, however, there are associated cleaning costs, and the IOM is recommended to be discarded due to contamination concerns after beryllium sampling (Brisson & Archuleta, 2009).…”

Section: Air Samplingmentioning

confidence: 99%

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Evaluation of a prototype inhalable sampler

Tompkins¹

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ii ACKNOWLEDGEMENTS First, I thank my advisor, Renée Anthony, for her guidance, voice of assurance and for allowing me to work on this project. When I entered her office over a year ago, she asked me what I wanted to gain from my thesis research and I told her that I wanted experience performing personal sampling. Through this project, I have fulfilled my goal and witnessed a side of manufacturing that many people do not see. This research has allowed me to build lasting relationships and gain a vast amount of technical skill. Thank you for being supportive of me in many ways, including funding, and for encouraging and equipping me with the skills I will need to succeed outside of this program. I am grateful for having Dr. Peters and Dr. O'Shaughnessy not only as professors, but also as my committee members. I thank them for their collaboration, critique and more importantly, for their patience as I encountered multiple timeline setbacks during the formation of this thesis. I would like to express my gratitude for this program, which brought together an intelligent and vibrant group of people that I will always get to call my friends. Without these friends and my calico cat, I do not believe I would be where I am today. I cannot express how truly grateful and blessed I am to have such supportive, amazing friends.Lastly, and most importantly, thank you to my family. I have wonderful grandparents who spent their 61 st anniversary road tripping from Virginia to see me in Iowa. I will forever be thankful for my mom's continual support provided throughout this phase of my life, even from over 900 miles away and at all times of day. Thank you for allowing me to spread my wings.iii ABSTRACT Occupational exposure limits are generally decreasing and traditional samplers used for quantifying occupational exposures have numerous limitations: cost, disposability, detection of low concentrations, and some even fail to match international inhalable sampling conventions.A low cost, high-flow (10 L min -1 ) inhalable prototype sampler was developed from the 37-mm cassette and tested in previous studies. These studies called for additional field testing as an area and personal sampler. The sampler was paired with the IOM (2 L min -1 ), a traditional inhalable air sampler, and deployed in metal working facilities. The samplers were compared to determine whether the prototype matched the IOM and whether the new sampler could improve the sensitivity for detecting lower concentrations of metals. The following processes were sampled: welding, grinding, soldering, pouring, sawing, tending and shooting guns. A total of 21 out of 28 paired samples had detectable metals out of 15 possible metals. There were seven out of eight personal samples and 14 out of 20 area samples with detectable metal concentrations. The average sample time was seven hours, but ranged from 4.2 -8.3 hours. The most common metals that were detected on 10 or more samples were iron, manganese, zinc, copper, and lead. Metal concentrations collected by the two samplers...

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Quartz in Coal Dust Deposited on Internal Surface of Respirable Size Selective Samplers

Soo

Lee

Kashon

et al. 2014

Journal of Occupational and Environmental Hygiene

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The objective of the present study is to quantify quartz mass in coal dust deposited on the internal cassette surface of respirable size-selective samplers. Coal dust was collected with four different respirable size-selective samplers (10 mm Dorr-Oliver nylon [Sensidyne, St. Petersburg, Fla.], SKC Aluminum [SKC Inc., Eighty Four, Pa.], BGI4L [BGI USA Inc., Waltham, Mass.], and GK2.69 cyclones [BGI USA Inc.]) with two different cassette types (polystyrene and static-dissipative polypropylene cassettes). The coal dust was aerosolized in a calm air chamber by using a fluidized bed aerosol generator without neutralization under the assumption that the procedure is similar to field sampling conditions. The mass of coal dust was measured gravimetrically and quartz mass was determined by Fourier transform infrared spectroscopy according to the National Institute for Occupational Safety and Health (NIOSH) Manual of Analytical Methods, Method 7603. The mass fractions of the total quartz sample on the internal cassette surface are significantly different between polystyrene and static-dissipative cassettes for all cyclones (p < 0.05). No consistent relationship between quartz mass on cassette internal surface and coal dust filter mass was observed. The BGI4L cyclone showed a higher (but not significantly) and the GK2.69 cyclone showed a significantly lower (p < 0.05) internal surface deposit quartz mass fraction for polystyrene cassettes compared to other cyclones. This study confirms previous observations that the interior surface deposits in polystyrene cassettes attached to cyclone pre-selectors can be a substantial part of the sample, and therefore need to be included in any analysis for accurate exposure assessment. On the other hand, the research presented here supports the position that the internal surface deposits in static-dissipative cassettes used with size-selective cyclones are negligible and that it is only necessary to analyze the filter catch.

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The Real Issue with Wall Deposits in Closed Filter Cassettes—What's the Sample?

Cited by 6 publications

References 31 publications

Analytical Performance Issues

Analytical Performance Issues

Evaluation of a prototype inhalable sampler

Quartz in Coal Dust Deposited on Internal Surface of Respirable Size Selective Samplers

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