PM 2.5采樣器空氣監(jiān)測用濾膜
PTFE濾膜按EPA PM 2.5方法的40CFR Part 50的要求下生產(chǎn)出來的，生產(chǎn)商必須按照以下列出的測試來做。
任何生產(chǎn)，銷售或提供銷售專門用于PM2.5 參照方法的濾膜商家，必須證明每批售出的濾膜都有一定數(shù)量經(jīng)過下列指定測試并且90%以上符合每一個(gè)測試項(xiàng)目：
- 松散、表面顆粒污染（loose,surface particle contamination.(Drop Test-Weight Loss Stability)
- 溫度穩(wěn)定性（溫度—Weight Loss Stability）
任何生產(chǎn)，銷售或提供銷售專門用于PM2.5參照方法的濾膜商家，必須證明每批受、售出的濾膜都至少有50個(gè)經(jīng)過下列指定測試并且90%以上符合每一個(gè)測試項(xiàng)目：
濾膜類型、濾膜直徑、濾膜厚度、濾膜孔徑、支撐環(huán)的寬度、支撐環(huán)的厚度（總的）、*高壓力點(diǎn)（清潔空氣）、*高濕氣點(diǎn)、收集率、堿性。
特殊要求
這些包括XRF微量金屬分析和肉眼缺陷檢查，例如：小孔、支撐環(huán)分離、渣滓或閃紋、松動、變色、不均勻?yàn)V膜或其他明顯的濾膜缺陷。
據(jù)此申明，每批生產(chǎn)并銷售的專用于PM2.5 參照方法的濾膜，符合EPA接受標(biāo)準(zhǔn)。
|
屬性
|
測試方法
|
測量單位
|
值
|
范圍
|
|
濾膜材質(zhì)
|
n/a
|
n/a
|
PTFE
|
-
|
|
濾膜厚度
|
μm
|
μm
|
40
|
±10
|
|
濾膜直徑
|
mm
|
模具
|
46.2
|
2.5
|
|
濾膜孔徑
|
ASTM F 316-94
|
μm
|
2
|
*大
|
|
支撐環(huán)材質(zhì)
|
n/a
|
n/a
|
聚丙烯
|
-
|
|
支撐環(huán)厚度
|
mm
|
mm
|
0.38
|
±0.04
|
|
支撐環(huán)寬度
|
mm
|
模具
|
3.68
|
±0.00-0.51
|
|
顆粒保留率（0.3μm）
|
ASTM D 2986-91
|
%
|
99.7
|
*小
|
|
Pressure Drop(0.3μm)@16.67L/min
|
ASTM D 2986-91
|
cm H2O
|
30
|
*大
|
|
堿性
|
Section 2.12 EPA/600/R-94/038b
|
μeq/g of filter
|
<25
|
*大
|
|
Temperture Wt.Loss Stability
|
同上
|
μg
|
<20
|
平均
|
|
Drop Test Wt.Stability
|
同上
|
μg
|
<20
|
平均
|
|
Moisture Wt.Gain Stability
|
同上
|
μg
|
<10
|
平均
|
|
品名
|
規(guī)格
|
包裝
|
|
PM2.5空氣監(jiān)測用濾膜
|
7592-104尺寸：46.2m，帶聚丙烯支撐環(huán)和順序編的PTFE膜
|
50張/包
|
| 熒光素X光檢測的*高痕量元素濃度 Maximum Trace Element Concentration by X-Ray Fluoresence |
| Ion |
ng/cm2 |
Ion |
ng/cm2 |
Ion |
ng/cm2 |
Ion |
ng/cm2 |
Ion |
ng/cm2 |
Ion |
ng/cm2 |
| Al |
94.4 |
Sc |
7.2 |
Ni |
3 |
Br |
2 |
Pd |
9.6 |
Cs |
25 |
| Si |
32.8 |
Ti |
13.8 |
Cu |
2.8 |
Rb |
2 |
Ag |
9.6 |
Ba |
32.2 |
| P |
22.6 |
V |
4.8 |
Zn |
2.2 |
Sr |
2.2 |
Cd |
10.8 |
La |
87.6 |
| S |
13.4 |
Cr |
2.2 |
Ga |
1.8 |
Y |
14.6 |
Sn |
15.2 |
W |
5 |
| Cl |
9.4 |
Mn |
2.2 |
Ge |
3 |
Zr |
13.2 |
Sb |
14.4 |
Au |
4.4 |
| K |
5.6 |
Fe |
5.8 |
As |
2.8 |
Mo |
11.6 |
Te |
16.2 |
Hg |
4.4 |
| Ca |
8.2 |
Co |
4 |
Se |
1.6 |
Rh |
9.4 |
I |
18.6 |
Pb |
4.8 |
A high-purity, thin PTFE membrane in a sequentially numbered chemically resistant polypropylene support ring for PM 2.5 ambient air monitoring. Whatman PM 2.5 membranes have low tare mass for accurate gravimetric determinations. The thermally stable design eliminates curling, keeps the membrane flat, and makes the filter robot-friendly.
The PM 2.5 PTFE membranes are manufactured under clean room conditions. These chemically resistant, low chemical background filters permit sensitive, interference-free determinations. No glues or adhesives are used in making these 46.2 mm diameter products.
Statement of Conformance
PTFE Filters for EPA PM 2.5 Reference Method.Under the requirements of 40 CFR Part 50, Appendix L, shown below, the manufacturer must perform the following tests as listed.
Any filter manufacturer or vendor who sells or offers to sell filters specifically identified for use with this PM 2.5 reference method shall certify that the required number of filters from each lot (0.1% or 10, whichever is greater) of filters offered for sale have been tested as specified for the following tests and meet 90% of each of the design and performance specifications:
- Loose, surface particle contamination. (drop test – weight loss stability)
- Temperature Stability. (temperature – weight loss stability)
Any filter manufacturer or vendor who sells or offers to sell filters specifically identified for use with this PM 2.5 reference method shall certify that a minimum number of 50 filters from each lot of filters offered for sale have been tested as specified for the following tests and meet 90% of each of the design and performance specifications:
- Filter type
- Filter diameter
- Filter thickness
- Filter pore size
- Support ring width
- Support ring thickness (total)
- Maximum pressure drop (clean filter)
- Maximum moisture pick-up
- Collection efficiency
- Alkalinity
- Special requirements
These include trace metal analysis by XRF and visual inspection for defects such as pinholes, support ring separation, chaff or flashing, loose material, discoloration, filter non-uniformity or any other obvious filter defect.
Whatman hereby states that every manufacturing lot that is offered for sale, and is identified for use with the PM 2.5 reference method, conforms to EPA acceptance criteria.
