Synthetic Blood Penetration- Splash Resistant And BFE

The Synthetic Blood Penetration – Splash Resistance test is one of two synthetic blood resistance tests offered by Nelson Laboratories to determine a product’s ability to act as a barrier to blood-borne pathogens. The Splash Resistance test method challenges medical face masks with a fixed volume of synthetic blood directed at high velocity at the center of the mask. ../../

合成血液穿透抗溅试验是尼尔森实验室提供的两种合成血液抵抗试验之一，用来测定一种产品对血液病原体的屏障能力。抗溅性能测试方法挑战医用口罩，在口罩的中心以固定的速度合成血液。

This test is required by ASTM F2100 and is tested in compliance with ASTM Method F1862, ASTM F2100 and EN 14683. Nelson Laboratories’ highly experienced staff provides a one-stop shop for all ASTM F2100 and EN 14683 testing.

该试验由ASTM f2100要求与ASTM方法f1862符合ASTM和EN 14683的测试，f2100尼尔森实验室经验丰富的员工提供所有ASTM和EN 14683的测试f2100…的一站式商店

In the Synthetic Blood Penetration – Splash Resistance test procedure, specimens are conditioned for a minimum of 4 hours at 21 ± 5ºC and 85 ± 5% relative humidity. The samples are removed from the conditioning chamber and mounted on the test fixture. The synthetic blood is pumped from a pressurized container equipped with a pneumatic-controlled valve and valve controller. The controller allows the valve to dispense a specified volume of synthetic blood through a small diameter canula in a controlled amount of time.../../

在合成血液穿透–飞溅阻力测试程序，标本培养至少4小时在21±5ºC和85±5%相对湿度。样品从调节室中取出并安装在测试夹具上。合成的血液是从装有气压控制阀和压力控制器的压力容器中抽取出来的。该控制器使得阀门取一定体积的合成血液控制量的时间的一个小直径套管

The time in which the valve remains open is calculated from the desired blood pressure. Medical face masks can be evaluated at three different velocities corresponding to a human blood pressure of 10.6, 16.0 and 21.3 kPa (80, 120 and 160 mm Hg).../../


阀门保持打开的时间是根据期望的血压计算出来的。医学口罩可根据人体血压10.6、16和21.3千帕（80, 120和160 mm Hg）的三种不同速度进行评估

As the valve opens, synthetic blood is allowed to spray through a 0.84 mm orifice onto the surface of the medical face mask. One spray is delivered to the center of the sample at a distance of 305 mm. The pressure of the vessel is adjusted so that approximately two ml of synthetic blood are delivered with each spray.../../

当阀门打开时，合成血液被允许通过0.84毫米的小孔喷到医用面罩的表面。一个喷雾送到样品的中心在305毫米的距离。调整容器的压力，使每次喷洒大约两毫升合成血液、

At the conclusion of the test, the back side of the medical face mask is observed for synthetic blood penetration. The results are scored as pass or fail, depending on whether synthetic blood penetration occurred.../../

·  For ASTM F1862: 80 mm Hg, 120 mm Hg or 160 mm Hg../../

    For EN 14683: 120 mm Hg or 160 mm Hg../../

·   结论of the试验后，方脸的面具，医学观察for合成血液穿透。结果是进了你通过金失败，根据是否发生合成血液穿透。

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 for a minimum of 4 hours at 21 ± 5°C and 85 ± 5 % relative humidity, a liquid suspension of S. aureus is aerosolized using a nebulizer 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).www

.wksafety.com  

细菌过滤效率测试通过比较细菌控制计数与试验品的流出物计数来确定过滤效率。试验采用金黄色葡萄球菌作为挑战生物。在过滤介质预处理至少4小时，在21±5°C和85±相对湿度5%，金黄色葡萄球菌悬浮液用雾化器雾化并送到过滤介质在每分钟28.3升的流量恒定（LPM）或1立方英尺每分钟（CFM）

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 – 2700 colony forming units (CFU) with a mean particle size of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9%.www.wksafety.com   

气溶胶水滴是通过六级安徒生采样器收集的。与过滤介质接触的细菌气溶胶小滴的数量是通过在测试系统中不受过滤介质进行挑战控制来确定的。挑战控制保持在1700–2700菌落形成单位（CFU）与3±0.3µM.这使过滤效率来报道了> 99.9%平均粒径

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 (MPS) can be tightly controlled and is sized using a six-stage viable particle Andersen sampler, permitting stage-by-stage analysis. The BFE procedure is very reproducible, easily performed 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.The BFE test is commonly performed along with the Differential Pressure (Delta P) test.www.wksafty.com  

BFE检测的A号码的受害者的优势超过其他的过滤效率的试验。它已被用于与小或没有修改为鸭提供一年的标准参考比较的过滤材料。平均粒度（MPS）可以紧控冰级和6级采用可行的粒级安德森采样器，permitting城市级分析。《冰reproducible BFE的程序很容易，performed和提供一个更严重的挑战，必须过滤设备会比预期的正常使用。大数可以通过材料可以在一个相对短的时间内。performed BFE检测常见的冰沿与压力差（△P）试验

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%. www.wksafety.com  

 对于内置过滤器，我们建议增加挑战法。这个过程使用更高浓度的挑战交付给每个测试材料。过滤效率测量可确定为> 99.9999%。