Bacterial & Viral Filtration Efficiency Tests | Nelson Labs

Bài viết Bacterial & Viral Filtration Efficiency Tests | Nelson Labs thuộc chủ đề về Wiki How thời gian này đang được rất nhiều bạn quan tâm đúng không nào !! Hôm nay, Hãy cùng HoaTuoiBatTu.vn tìm hiểu Bacterial & Viral Filtration Efficiency Tests | Nelson Labs trong bài viết hôm nay nhé ! Các bạn đang xem bài : “Bacterial & Viral Filtration Efficiency Tests

Đánh giá về Bacterial & Viral Filtration Efficiency Tests | Nelson Labs


Xem nhanh

Bacterial & Viral Filtration Efficiency Tests | Nelson Labs

The Bacterial Filtration Efficiency (BFE) test is performed on filtration materials and devices that are designed to provide protection against biological aerosols, such as face masks, surgical gowns, caps, and air filters. Download a breakdown of Medical Face Mask Tests and Requirements HERE.

This test is used for FDA 510(k) submissions for surgical masks, is required by ASTM F2100 and EN 14683, and complies with ASTM F2101 and EN14683. Nelson Labs staff assisted in the development of this test method, so we have more experience conducting this test than any other company. We can provide a one-stop shop for all ASTM F2100 and EN 14683 testing needs. Download a breakdown of medical face mask tests and requirements HERE

Applicable Standards

  • ASTM F2100
  • EN 14683
  • ASTM F2101

Testing Locations

Study Outline

Bacterial Filtration Efficiency (BFE)

The Bacterial Filtration Efficiency test determines the filtration efficiency by comparing the bacterial control counts to test article effluent counts. The test is conducted using Staphylococcus aureus as the challenge organism. After the filtration media is preconditioned, a liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 28.3 liters per minute (LPM) or 1 cubic foot per minute (CFM).

Mọi Người Cũng Xem   Vì sao ngày càng có nhiều người thích sống độc thân?

The aerosol droplets are drawn through a six-stage Andersen sampler for collection. The number of bacterial aerosol droplets contacting the filter media is determined by conducting challenge controls without filter medium in the test system. Challenge controls are maintained at 1700 – 3000 colony-forming units (CFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9%.

The BFE test offers a number of advantages over other filtration efficiency tests. It has been used with little or no modification for years and provides a standard reference for comparison of filtration materials. The mean particle size can be tightly controlled and is sized using a six-stage viable-particle Andersen sampler, permitting stage-by-stage analysis. The BFE procedure is reproducible, and provides a more severe challenge to most filtration devices than would be expected in normal use. Large numbers of material can be evaluated in a relatively short time.

BFE testing is commonly performed along with the Differential Pressure (Delta P) test.

For housed filters, we recommend the Increased Challenge method. This procedure uses a higher concentration of challenge to be delivered to each test material. Filtration efficiency measurements can be determined up to >99.9999%.

Increased Challenge Bacterial Filtration Efficiency (BFE)

The Increased Bacterial Filtration Efficiency test determines the filtration efficiency by comparing the bacterial control counts to test article effluent counts. The test is conducted using Staphylococcus aureus as the challenge organism. A liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 30 liters per minute (LPM).

Mọi Người Cũng Xem   Các kênh YouTube kiếm tiền thế nào

The aerosol droplets are collected in all-glass impingers (AGIs) in parallel. The challenge is delivered for a one-minute interval and sampling through the AGIs is conducted for two minutes to clear the aerosol chamber. The titer of the assay fluid is determined using standard plate count and/or membrane filtration techniques. The number of bacterial aerosol droplets contacting the filter media is determined by conducting challenge controls without filter media in the test system. Challenge controls are maintained at ≥ 1 x 106 colony-forming units (CFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9999%.

The Increased BFE testing offers a number of advantages over other filtration efficiency tests. It has been used with little or no modification for years and provides a standard reference for comparison of filtration materials. The Increased BFE procedure is very reproducible, easily performed, and provides a more severe challenge to most filtration devices than would be expected in normal use.

Viral Filtration Efficiency (VFE)

The Viral Filtration Efficiency (VFE) test follows the same procedure as BFE, except the challenge organism used is the bacteriophage phiX174.

Challenge controls are maintained at 1100-3300 plaque-forming units (PFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9%.

Increased Challenge Virus Filtration Efficiency (VFE)

The Increased VFE test follows the same procedure as BFE, except the challenge organism used is the bacteriophage phiX174.

Challenge controls are maintained at ≥1×106 plaque-forming units (PFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9999%

Mọi Người Cũng Xem   Vietnam Silver House

Shipping requirements: Ambient

If you have additional questions about Bacterial & Viral Filtration Efficiency (BFE & VFE) testing, or would like to consult with the experts at Nelson Labs, just send us a request or call us at +1 (801) 290-7500.

Nelson Laboratories, LLC – A Sotera Health company © 2019 All rights reserved

Chat Now

We use cookies to improve your site experience, assess usage of the site, and to support the marketing of our services. For information about how to set cookie preferences, please visit our Cookie Policy. If you agree to our use of cookies press “I Agree”, or continue to use our site, which will be considered consent. I Agree



Các câu hỏi về bfe là gì


Nếu có bắt kỳ câu hỏi thắc mắt nào vê bfe là gì hãy cho chúng mình biết nhé, mõi thắt mắt hay góp ý của các bạn sẽ giúp mình cải thiện hơn trong các bài sau nhé <3 Bài viết bfe là gì ! được mình và team xem xét cũng như tổng hợp từ nhiều nguồn. Nếu thấy bài viết bfe là gì Cực hay ! Hay thì hãy ủng hộ team Like hoặc share. Nếu thấy bài viết bfe là gì rât hay ! chưa hay, hoặc cần bổ sung. Bạn góp ý giúp mình nhé!!

Các Hình Ảnh Về bfe là gì


Các hình ảnh về bfe là gì đang được Moviee.vn Cập nhập. Nếu các bạn mong muốn đóng góp, Hãy gửi mail về hộp thư [email protected] Nếu có bất kỳ đóng góp hay liên hệ. Hãy Mail ngay cho tụi mình nhé

Tham khảo thêm báo cáo về bfe là gì tại WikiPedia

Bạn hãy xem thông tin chi tiết về bfe là gì từ trang Wikipedia.◄ Tham Gia Cộng Đồng Tại

???? Nguồn Tin tại: https://hoatuoibattu.vn/

???? Xem Thêm Chủ Đề Liên Quan tại : https://hoatuoibattu.vn/hoi-dap/

Related Posts

About The Author