pm 2.5采样器空气监测用滤膜
ptfe滤膜按epa pm 2.5方法的40cfr part 50的要求下生产出来的，生产商必须按照以下列出的测试来做。
任何生产，销售或提供销售专门用于pm2.5 参照方法的滤膜商家，必须证明每批售出的滤膜都有一定数量经过下列指定测试并且90%以上符合每一个测试项目：
- 松散、表面颗粒污染（loose,surface particle contamination.(drop test-weight loss stability)
- 温度稳定性（温度—weight loss stability）
任何生产，销售或提供销售专门用于pm2.5参照方法的滤膜商家，必须证明每批受、售出的滤膜都至少有50个经过下列指定测试并且90%以上符合每一个测试项目：
滤膜类型、滤膜直径、滤膜厚度、滤膜孔径、支撑环的宽度、支撑环的厚度（总的）、*高压力点（清洁空气）、*高湿气点、收集率、碱性。
特殊要求
这些包括xrf微量金属分析和肉眼缺陷检查，例如：小孔、支撑环分离、渣滓或闪纹、松动、变色、不均匀滤膜或其他明显的滤膜缺陷。
据此申明，每批生产并销售的专用于pm2.5 参照方法的滤膜，符合epa接受标准。
|
属性
|
测试方法
|
测量单位
|
值
|
范围
|
|
滤膜材质
|
n/a
|
n/a
|
ptfe
|
-
|
|
滤膜厚度
|
μm
|
μm
|
40
|
±10
|
|
滤膜直径
|
mm
|
模具
|
46.2
|
2.5
|
|
滤膜孔径
|
astm f 316-94
|
μm
|
2
|
*大
|
|
支撑环材质
|
n/a
|
n/a
|
聚丙烯
|
-
|
|
支撑环厚度
|
mm
|
mm
|
0.38
|
±0.04
|
|
支撑环宽度
|
mm
|
模具
|
3.68
|
±0.00-0.51
|
|
颗粒保留率（0.3μm）
|
astm d 2986-91
|
%
|
99.7
|
*小
|
|
pressure drop(0.3μm)@16.67l/min
|
astm d 2986-91
|
cm h2o
|
30
|
*大
|
|
碱性
|
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
|
规格
|
包装
|
|
pm2.5空气监测用滤膜
|
7592-104尺寸：46.2m，带聚丙烯支撑环和顺序编的ptfe膜
|
50张/包
|
| 荧光素x光检测的*高痕量元素浓度 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.