Validation of a Quantitative Fit Test for Dust/Fume/Mist Respirators: Part I

Iverson, Sandra G.; Danisch, Susan G.; Mullins, Haskell E.; Rudolph, S.

doi:10.1080/1047322x.1992.10389173

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…This method was intended to be used for filtering facepiece and elastomeric respirators but was not valid for HEPA filters due to a higher pressure drop . Researchers determined that the penetration rate for dust–mist respirators adequately sealed to a mounting plate with hot melt adhesive averaged 0.1%. , Other researchers have demonstrated that particles with 2.0–2.5 μm diameters have an 80–90% penetration rate though face-seal leaks in filtering facepiece respirators even at a low pressure drop …”

Section: Materials and Methodsmentioning

confidence: 99%

“…30 Researchers determined that the penetration rate for dust−mist respirators adequately sealed to a mounting plate with hot melt adhesive averaged 0.1%. 31,32 Other researchers have demonstrated that particles with 2.0−2.5 μm diameters have an 80− 90% penetration rate though face-seal leaks in filtering facepiece respirators even at a low pressure drop. 22 The integrity of a seal for filtering facepiece respirators secured to their mounting plates with hot melt adhesive was evaluated by measuring penetration of monodisperse 2 μm latex spheres at 35 lpm according to the 3 M LPQFT method.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Collection Efficiency Comparison of N95 Respirators Saturated with Artificial Perspiration

Larson

2020

ACS Chem. Health Saf.

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Due to the COVID-19 pandemic, current high demand for N95 filtering facepiece respirators has placed them in short supply. Filtering facepiece respirator wearers have traditionally been instructed to discard their respirator and don a new one should the respirator become saturated with perspiration or damp from exhaled breath. However, today’s shortage may prohibit many N95 respirator wearers from replacing their filtering facepieces at this desired frequency. Previously unpublished research that evaluated the performance of N95 filtering facepiece respirators saturated with artificial perspiration and then dried out can help provide insight into making critical decisions about the change out frequency of N95 respirators that become damp with use. This study concluded that the collection efficiency of filtering facepiece respirators, containing electrostatic filter media, remained statistically unchanged or slightly improved after being dried out following harsh saturation conditions with artificial perspiration. Therefore, respirator wearers can continue to rely on their N95 filtering facepiece respirators to perform as intended.

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