WHATMAN filter membrane for PM2.5 air monitoring in the UK 7592-10

Whatman PM2.5 PTFE membranes are made in a clean workspace, and these chemically resistant, low background membranes ensure high sensitivity and interference free detection results. The membrane diameter is 46.2mm and does not contain binders or adhesives.

Unified Declaration

PTFE filter membranes produced according to the requirements of 40 CFR Part 50 of EPA PM 2.5 method must be tested by the manufacturer according to the following listed tests.

Any filter membrane merchant that produces, sells, or offers for sale the PM 2.5 reference method must demonstrate that a certain quantity (0.1% or less than 10) of each batch of filter membranes sold has undergone the following tests and that more than 90% of them meet each test item:

Loose, surface particle contamination. (Drop Test West Loss Stability)

Temperature Stability (Temperature Weight Loss Stability)

Whatman PM2.5 air monitoring filter membrane, 7592-104

Any filter membrane merchant that produces, sells, or offers for sale the PM 2.5 reference method must demonstrate that at least 50 of each batch of sold filters have undergone the following tests and that 90% or more of them meet each test item:

Filter membrane type

Filter membrane diameter

Filter membrane thickness

Filter membrane pore size

Width of support ring

Thickness of support ring (total thickness)

Pressure point (clean filter)

Moisture point

Collection efficiency

alkalinity

special requirements

Including XRF trace metal analysis and visual inspection of defects caused by naked eye, such as separation of support rings, slag or flash marks, looseness

Discoloration, uneven filter membrane or other obvious filter membrane defects.

Whatman hereby declares that each batch of filter membranes produced and sold using the PM2.5 reference method complies with EPA standards.