Workplace Protection Factor Evaluation of Respiratory Protective Equipment in a Primary Aluminum Smelter

Gaboury, A.; Burd, D. H.; Friar, R. S.

doi:10.1080/1047322x.1993.10388111

Cited by 13 publications

(9 citation statements)

References 5 publications

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“…Previous authors have analyzed WPF values as a function of C o (7,(9)(10)(11) or sought correlation between WPFs and quantitative fit factors (QNFFs). (12)(13)(14)(15) Because all but one of the C i measurements in this study were below the detection limit for lead, it is not meaningful to attempt these analyses. Clearly, it can be said that in this study the respirator performed very well, providing much more than the expected fiftyfold reduction in exposure.…”

Section: Wpf Resultsmentioning

confidence: 97%

“…However, several half facepiece WPF studies have not shown a significant correlation between QNFFs and WPFs. (11)(12)(13) Consistent with the definition of WPF, (2) each of the studies included only subjects with acceptable fit factors of 100 for half facepieces. (3) Zhuang et al (14) and Han (15) both reported a correlation (r 2 = 0.55 and 0.38, respectively) between QNFFs and workplace measurements for half facepiece respirators.…”

Section: Wpf Resultsmentioning

confidence: 99%

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Performance of a Full Facepiece, Air-Purifying Respirator Against Lead Aerosols in a Workplace Environment

Janssen¹,

Bidwell²

2007

Journal of Occupational and Environmental Hygiene

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This study evaluated workplace performance of a full facepiece, negative pressure, air-purifying respirator with P100 filters in a lead refining plant. Air samples for lead were collected inside and outside the respirators worn by workers who were properly trained and quantitatively fit tested. Trained observers assisted in the study to ensure sample validity. Three to four pairs of air samples per day were collected from each worker for a total of 52 valid sample sets. Lead was found on all the outside samples, and concentrations were below the detection limit for all but one of the inside samples. The single measurable inside sample yielded a workplace protection factor (WPF) of 297. WPFs for the rest of the samples were estimated using the assumption that lead was present at the detection limit for the in-facepiece samples. Calculated WPFs were rounded down to the nearest 100 then subjected to a rank and percentile function. The 5th percentile WPF was approximately 900 using this approach. These WPFs exceed the assigned protection factor (APF) of 50 for this respirator class recommended by the National Institute for Occupational Safety and Health and listed by the Occupational Safety and Health Administration. These results support the APF of 50 for this respirator and indicate the respirator provided adequate protection as used in this study.

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Section: Wpf Resultsmentioning

confidence: 97%

Section: Wpf Resultsmentioning

confidence: 99%

Performance of a Full Facepiece, Air-Purifying Respirator Against Lead Aerosols in a Workplace Environment

Janssen¹,

Bidwell²

2007

Journal of Occupational and Environmental Hygiene

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“…Correlation between WPF and FF It can be thought that, the better the FF yields on workers/ respirator combination, the better the WPF would be. Many researches were, therefore, conducted to identify correlation between WPF and FF, but most of all research showed no correlations between them [8][9][10][11] or weak correlations 23) . Correlation analysis was performed to evaluate the relationship between the WPF measured and the FF data for each respirator and for all respirators, using the WPF for the dependant variables and the FF for independents variables.…”

Section: Outside and Inside Fe Concentrations Wpfs And Ffsmentioning

confidence: 99%

“…Up to now unfortunately no studies have been reported or found in the literature that identified such correlations. Those that have attempted to identify such correlations have been unsuccessful [8][9][10][11] . Meanwhile although a large portion of disposable filtering facepieces used in Korea is domestic, not a small number of those type respirator filters is imported from foreign countries, especially, the United States.…”

Section: Introductionmentioning

confidence: 99%

Correlations between Workplace Protection Factors and Fit Factors for Filtering Facepieces in the Welding Workplace.

Han

2002

INDUSTRIAL HEALTH

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“…There was no obvious relationship between assigned protection factors and workplace protection factors. Some following studies were conducted on WPF and the simulated workplace protection factor (SWPF) as well (Gaboury et al, 1993).…”

Section: The Assigned Protection Factor (Apf) Of Half Mask Paprs Is 5mentioning

confidence: 99%

Performance Study of an Unconventional Breathresponse PAPR Against a N95 FFR and Conventional PAPRs

Yang¹

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Healthcare workers (HCWs) are the first responders when infectious pathogens occur. Powered air-purifying respirators (PAPRs) are one of the most widely used personal protective equipment for healthcare workers. Currently, few studies have been performed with HCWs in the actual healthcare work environments to assess discomforts, acceptance and protective efficiency towards wearing and use of PAPRs. The main purpose of this dissertation was to introduce and assess a brand new unconventional PAPR (Koken breath-response PAPR). The protection performance and user preferance of this unconventional PAPR were studided and compared to that of a N95 FFR and traditional PAPRs. Firstly, a laboratory experiment was conducted to test the performance of the unconventional breath-response respirator (Koken PAPR) during different breathing flow types and rates, faceseal leakages, and motor conditions (fan on or fan off). The results First and foremost, I would like to express my sincere gratitude to my advisor Dr. Xinjian (Kevin) He. Without his support, I would not have the opportunity to pursue my Ph.D. degree in West Virginia University. My sincerely thanks not only for his tremendous and continuous academic support, but also for his patience, motivation, and immense knowledge. His guidance helped me in all the time of research and writing of this dissertation. Dr. He is the greatest advisor that I have ever met in my Ph.D. study. I also would like to thank Dr. Anna Allen for providing professional guidance on my dissertation research. This work would not have been possiblely completed without her endless help.

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Workplace Protection Factor Evaluation of Respiratory Protective Equipment in a Primary Aluminum Smelter

Cited by 13 publications

References 5 publications

Performance of a Full Facepiece, Air-Purifying Respirator Against Lead Aerosols in a Workplace Environment

Performance of a Full Facepiece, Air-Purifying Respirator Against Lead Aerosols in a Workplace Environment

Correlations between Workplace Protection Factors and Fit Factors for Filtering Facepieces in the Welding Workplace.

Performance Study of an Unconventional Breathresponse PAPR Against a N95 FFR and Conventional PAPRs

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