PTFE with support ring for PM 2.5

46.2mm PTFE membrane with support ring(EPA40 CFR part50, Appendix L) for gravimetric measurement of PM2.5 in ambient air

PM2.5 monitoring membrane manufactured according to US EPA standard, applied in the monitoring for airborne PM2.5 and other air sampling. Additionally, extremely low extractables and fluorescence background benefit in trace element analyses, e.g. ICP-MS & ED-XRF.

Features

Conforms to EPA40 CFR part50, Appendix L

Sequence number coded on each membrane

No particles shedding, high stability

High sensitivity, extremely low extractables

Specification

Membrane

High purity hydrophobic PTFE

Pore Size

2μm

Material of Support ring

PP

Diameter

46.2±0.25mm

Membrane Thickness

40±10μm

Thickness of Support Ring

0.38±0.04mm

Width of Support Ring

3.68±0.00-0.51mm

DOP Retention(0.3 µm)

＞99.7%

Flow Rate and Pressure Drop

＜30cm H2O柱@ 16.67L/min

Drop Test Wt. Sability

＜20µg

Temperature Wt. Loss Stability
＜20µg

Moisture Wt. Gain Stability

＜10µg

Alkalinity

＜25µeq/g