滤纸在空气采样上操作的应用
由于人类意识到室内空气污染的问题，更有鉴于发现室内所使用的材料有致癌疑虑，所以滤纸在空气采样成为环保及职业卫生重要的检测环节。因为微粒在空气的阻力较小，能滞留于滤纸上累积达到捕集的效果。
滤纸大致上可分两种类型：深层滤纸及薄膜滤纸。两种滤纸捕集功能不同，以0.8μm滤纸为例，薄膜滤纸可将微粒完全保留，但深层滤纸则不能完全截留。而孔径的大小取决于液体过滤后残留之微粒大小，所保留的微粒尺寸即决定了滤纸的孔径。
薄膜滤纸: 组成均匀，多孔性组织结构。薄膜滤纸不能使用于”筛选”颗粒大小。薄膜滤纸表面增加 深层滤纸: 不均匀的纤维结构。其孔径大小是决定于破出颗粒大小的决定。因破出会造成样品的损
的重量即是颗粒大小保留于滤纸上颗粒，因颗粒会填塞于滤纸上。而相同的情况于深层滤纸微粒可能会穿透。
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美国SKC滤膜过滤器
滤纸-空气中粒状物之采样 Filters for Particulate Sampling
滤纸在空气采样上的应用已有20年以上。SKC的滤纸种类繁多，从材质来区分有纤维素酯类 ，聚氯乙烯，聚碳酸酯，铁弗龙，银膜，玻璃纤维，石英纤维，纤维素，明胶等。空气采样时除了 滤纸外，尚需要滤纸匣，滤纸匣固定座及其他多种相关配件，而滤纸匣亦有预装滤纸经特殊涂敷料 处理之滤纸，以供特定化合物的采样，代替液体冲击瓶的采样法。如何选择适当的滤纸则可参见美国NIOSH、OSHA、USEPA、ASTM或国内IOSH、NIEA等机构所公 告的标准方法与下列分类说明。
滤纸种类及特性比较:
材质 缩写 孔径 尺寸 主要性质 空气采样应用 纤维素酯 MCE 0.45 μm 25 mm 亲水性 金属粉尘分析 聚氯乙烯 PVC 0.2 μm 25 mm 疏水性 重量分析 铁弗龙 PTFE 0.5 μm 13 mm 疏水性 碱性粉尘 聚碳酸酯 PC 0.3 μm 25 mm 疏水性 扫描式电子显微镜 银膜 AG 0.45 μm 25 mm 可与广泛溶剂兼容 氯、溴 玻璃纤维 FG 1.0 μm 13 mm 部分疏水性 农药 石英 QZ 1.2 μm 25 mm 同玻纤特性 空气采样 纤维素 CEL (Nominal) 可高压灭菌 AA
Mixed Cellulose Esters
0.8 μm
1.2 μm
5.0 μm
37 mm
47 mm
可溶解适于原子吸光分析
可形成透明供穿透显微分析
易于溶解并且澄清
石绵与人造纤维
Pure Homopolymer PVC
0.5 μm
0.8 μm
2.0 μm
5.0 μm
37 mm
47 mm
非氧化表面
不含硅
低灰含量
低吸水性
低净重适于重量分析
六价铬
Teflon/Polytetra
fluoroethylene
5.0 μm
1.0 μm
2.0 μm
25 mm
37 mm
47 mm
不溶于酸硷与溶剂
可高压灭菌
多环芳香烃
农药
异氰酸盐
Polycarbonate
0.4 μm
0.8 μm
37 mm
47 mm
显微镜下光滑表面
直穿透孔隙
极薄(10-20um)与穿透性
可高压灭菌
石绵纤维
Silver membrane
0.8 μm
37 mm
耐高温
可高压灭菌
均匀的孔筛及厚度
以TEM测定石绵
以X线绕射分析硅
Glass Fiber
(Liquid Nominal Rating)
25 mm
37 mm
47 mm
8×10in
耐高温
高压灭菌
高粒状物保持力
粒状物
异氰酸盐
乙醇
Quartz
(Liquid Nominal Rating)
37 mm
47 mm
102 mm
8×10in
金属含量低
高温可达300℃
可高压灭菌
气胶粒状物
PM 10
柴油粒状物
Cellulose
均一强度
无灰(Whatman Type 40)
HPLC
订货号 描述 价格/元 225-0020 IMPINGER, PFA, VERT & SIDE PORT OR, V&S PORT 1589 225-0021 IMPINGER, PFA, TWO VERT PORTS OR, 2V PORTS 1767 225-0022 IMPINGER TUBE BEND, PFA 446 225-0023 IMPINGER TUBE BEND, PFA 446 225-0026 HOLDER, PFA, IMPINGER 740 225-0027 HOLSTER, PFA, IMPINGER 394 225-01-01 CYCLONE, 25MM, ALUM 1260 225-01-02 CYCLONE, 37MM, ALUM 1260 225-01-03 CALIBRATION ADAPTER, ALUM CYCL 473 225-1 HOLDER, FILTER CASSETTE 457 225-100 CYCLONE, GS-3, 37MM 1260 225-101 CYCLONE CASS ADAPTER 25MM, GS 150 225-102 CYCLONE CASS ADAPTER 37MM, GS 150 225-103 CYCLONE, GS-3, 25MM 1260 225-105 CYCLONE, GS-1, 10MM 1260 225-108 ADAPTER, BOWL, GS-1 CYCLONE 299 225-1107 HOLDER, FILTER, OPEN, 25MM, 6PK 4016 225-1109 HOLDER, FILTER, 25MM, 6PK 4016 225-111 CALIBRATION JAR, STANDARD 713 225-112 CALIBRATION JAR, LARGE 945 225-1147 HOLDER, FILTER,47MM, POLYPROP 1409 225-13-1 FORCEPS 173 225-13-2 ADAPTERS, PVC 10PK 214 225-13-3 ADAPTERS, METAL 10PK 457 225-13-4 TUBING, TYG, 1/4ID 3/8 OD 10FT 567 225-13-4A TUBING, TYGON, 3/8 OD, 3.3 FT 260 225-13-5A OPENER, CASSETTE 513 225-13-6 CLIP/CABLE TIE 10PK 394 225-13-6A CLIP/CABLE TIE 25 PK 945 225-13-7 LIFTER, FILTER 834 225-13-8 TUBING, CLIP & TIE 284 225-132A ADAPTERS, PVC, 250PK 4445 225-1344 FORCEPS, PTFE COATED TIP 772 225-1345 TUBING, TYG, 1/4ID 3/8OD 50FT 2347 225-1346 TUBING, TYG,3/16ID 5/16OD 10FT 536 225-1347 TUBING, RUB, 1/4ID,1/16WT,10FT 662 225-1348 SUPPORT, SPRING FOR TUBING 5PK 268 225-1349 TUBING, TYGON, 5/16 ID, 9/16 OD. 10 FT 1496 225-1350 TUBING, POLYURETHANE, REINFD,10FT 1181 225-1351 TUBING, TYGON, 3/8IN ID, 10FT 1024 225-1352 TUBING, TYGON, 3/8IN ID, 50FT 4489 225-1353 TUBING, TYGON, 1/2IN ID, 10 FT 1024 225-1370 LABELS, SAMPLING, 500PK 677 225-16 FILTER, GLASS (500PK) 1748 225-1601 FILTER, POLYCARB,.8,25MM,100PK 1606 225-1602 FILTER, POLYCARB,.8,37MM,100PK 2088 225-1603 FLTR-POLYCARB-.8,47MM, 100PK 2401 225-1604 FILTER CASSETTES, POLYCARB, 50PK 2495 225-1608 FILTER, POLYCARB, 25MM, 100PK 1391 225-1609 FILTER, POLYCARBONATE, 37MM, 100PK 1820 225-1610 FILTER, POLYCARB, 47MM, 100PK 2115 225-17-01 FILTER, PTFE,1.0,37MM,100PK 5212 225-17-03 FILTER, PTFE,5.0,13MM,100PK 2373 225-17-04 FILTER, PTFE, .45, 37MM, 100PK 6158 225-1709 FILTER, PTFE, 2.0, 37MM, 50 PK 3989 225-1711 FILTER, PTFE, 3.0, 25MM, 50PK 8193 225-1712 HOLDER,FILTER,PFA, 47MM 2124 225-1713 CASSETTE, PTFE, 37MM, 50PK 3726 225-1715 CASSETTE, PTFE,1.0,37MM,50PK 5060 225-1722 FILTER, PTFE 0.3, 100PK 4266 225-1723 CASSETTE, PTFE 0.3, 50PK 5444 225-1724 FILTER-PTFE, 47MM, 100PK 5435 225-1725 FILTERS, PTFE, 25MM, 50PK 5765 225-1728 FILTER-PTFE, 5.0, 25MM, 50PK 1602 225-1729 FILTER-PTFE, 37MM, 100PK 4302 225-1747 FILTER, PTFE, 2.0, 47MM, 50PK 5051 225-1748 FILTER, PTFE, 2.0, 47MM, 50PK 3231 225-1751 CASSETTE,PTFE,1UM,25MM,2-PC,50PK 5422 225-1752X CASSETTE, PTFE, 25MM, 50PK 5940 225-1755 FILTER-PTFE, 47MM, 100PK 4404 225-1762 FILTER-PTFE, 37MM, RESPICON, 50PK 3508 225-17A FILTER, PTFE, 5.0, 37MM, 50PK 2624 225-1801 FILTER, SILVER, 37MM, 0.8, 25PK 5498 225-1802 FILTER, SILVER, 25MM, 0.45, 50PK 5980 225-1803 FILTER, SILVER, 25MM, 50PK 5980 225-1804 FILTER, SILVER, 47MM, 25PK 7568 225-1809 FILTER, QUARTZ, 37MM, HT,100PK 7622 225-1811 FILTER, QUARTZ, 47MM,100PK 4373 225-1820 FILTER, QUARTZ, 8X10, 25PK 6944 225-1821 FILTER, QUARTZ, 102MM, 25PK 1696 225-1822 FILTER, QUARTZ, 37MM,ECON,25PK 1571 225-1823 FILTER, QUARTZ, 47MM, 25PK 1767 225-1824 FILTER, QUARTZ, 25MM, 100PK 973 225-1825 FILTER, QUARTZ, 25MM, 100PK 4445 225-1826 FILTER, QUARTZ, 34MM, MARPLE, 50PK 1763 225-1827 FILTER, QUARTZ, 37MM, 100PK 1736 225-1830 FILTER, QUARTZ, 47MM,1.2UM, 100PK 2115 225-18A FILTER, CELLULOSE, TYPE40, 500PK 1633 225-18B FILTER, CELLULOSE, TYPE 4, 500PK 1522 225-19 FILT,MCE.8,25MM,100PK 772 225-1911 FILTERS, MCE, 25MM, 100PK 629 225-1912 FILTER, MCE, 1.2, 25MM, 100PK 830 225-1913 FILTER, MCE, 25MM,BLACKGRID,100PK 785 225-1914 FILTERS, MCE, 37MM, 100PK 1302 225-1915 FILTERS, MCE, 20MM, 100PK 785 225-1921 FILTERS, MCE, 47MM, 100PK 1624 225-1922 FILTERS, MCE, 37MM WITH HOLE, 100PK 3525 225-1923 FILTERS, MCE, 37MM, 1.2 UM, 100PK 1566 225-1924 FILTER CASSETTES, MCE, 37MM, 50PK 2722 225-1925 CASSETTE, MCE, BESTCHEK, 37MM, 50PK 2651 225-1930 FILTERS, MCE, 25MM, 100PK 598 225-1931 FILTERS, MCE, 37MM, 0.8, 100PK 677 225-1932 FILTER,MCE, 34MM,SLITS/MARPLE 50PK 1415 225-1933 FILTER,MCE, 37MM, 100 PK 1125 225-1934 FILTER, MCE, 25MM,GRID, 50PK 1879 225-1938 FILTER, MCE, 37MM, 5.0, 100PK 1714 225-1939 FILTER-MCE, W/O PADS, 37MM, 100PK 820 225-1941 FILTER-MCE, 37MM, RESPICON, 100PK 3525 225-2 CASSETTE-2PC 10PK 179 225-2-01 SLIDE/PETRI DISH 100PK 1874 225-2-25LF CASSETTE, 2-PC, SURE-SEAL, 50 PK 1540 225-20 HOLSTER-MIDGET IMPINGER 394 225-20-01 HOLDER, IMPINGER, SGL 583 225-20-02 HOLDER, MIDGET IMPINGER, DBL 662 225-2050LF CASSETTE, 2-PC, LEAK-FREE, 50PK 665 225-22 TRAP, MIDGET IMPINGER 961 225-22-01 TRAP, MICRO IMPINGER (PK/3) 977 225-22-02 SORBENT, TRAP (200 GM) 740 225-2250 CASSETTE-OMEGA, 2-PC, 37MM, 250PK 3258 225-2257 CASSETTE, 2-PC 25MM, CONDUC, 50PK 910 225-2258 CASSETTE, 2-PC, 25MM, FLAT, 100PK 2575 225-2259 CASSETTE, 3-PC, 25MM, FLAT, 100PK 3159 225-23 SPACERS, PMA PAD (PK/25) 589 225-24 TABS, SMEAR (PK/100) 696 225-2400 SWABS, STERILE, PK/50 910 225-2401A WIPE SAMPLE KIT, DELUXE 5534 225-2402 SURFACE SWAB KIT 625 225-2404 TEST KIT, LEAD CHECK (PK/8) 518 225-2404A TEST KIT, LEAD CHECK (PK/16) 982 225-2413 SURFACE, GHOST WIPES, 1000 PK 4266 225-2414 SURFACE, GHOSTWIPES, 200PK 928 225-2415 TEMPLATE, 10 X 10 250PK 910 225-2415A TEMPLATE, 10 X 10, 10PK 62 225-2416 TEMPLATE FOR LEAD, 12 X 12, PAPER, 250PK 1874 225-2416A TEMPLATE FOR LEAD, 12 X 12, PAPER, 10PK 118 225-2420 TEST KIT, SOIL, LEAD, 6 TESTS 1000 225-25 CASSETTE BANDS, 37 MM (PK/100) 286 225-2503 CASSETTE BANDS, 25MM (PK/100) 277 225-2503A CASSETTE BANDS, 25MM (PK/1400) 1963 225-2504 CASSETTE BANDS, 37MM, ORNGE, 100PK 303 225-2504A CASSETTE BANDS, 37MM, ORNGE, 1000PK 1963 225-2507 CASSETTE BANDS, 37MM, YELLOW 100PK 303 225-2507A CASSETTE BANDS, 37MM, YELLOW 1000PK 1963 225-2508 CASSETTE BANDS, 37MM, RED, 100PK 303 225-2508A CASSETTE BANDS, 37 MM, RED, 1000 PK 1963 225-2509 CASSETTE BANDS, 37MM, CLEAR, 100 PK 303 225-2509A CASSETTE BANDS, 37MM, CLEAR, 1000PK 1963 225-2510 CASSETTE BANDS, 25MM, CLEAR,1400PK 2445 225-2514 CASSETTE BANDS, 25MM, YELLOW 1400PK 1950 225-2515A CASSETTE BANDS, 37MM, BLACK, 1000PK 1963 225-25A CASSETTE BANDS, 37MM, WHITE 1000PK 1816 225-26 SCREEN, SS, 37 MM WIDE MESH 254 225-2625 SCREEN, SS, 25 MM WIDE MESH 178 225-2637 SCREEN, SS, 37 MM, FINE MESH 411 225-2647 SCREEN, SS, 47MM WIDE MESH, 2PK 588 225-2647A SCREEN, SS, DPS SUPPORT, FINE MESH 488 225-269-25 CYCLONE, GK 2.69, 25 MM 6783 225-269-37 CYCLONE, GK 2.69, 37 MM 6783 225-27 PAD, SUPPORT,37MM, 100PK 281 225-27-07 FILTER, PTFE, 2.0, 37MM, 50PK 3481 225-2700 PAD, SUPPORT (PK/500) 1325 225-2705 FILTER, PTFE, 1.0, 37MM, 50PK 3909 225-2705C CASSETTE, PTFE, 1.0, 37 MM, PP SUP, 100PK 14679 225-2708 FILTER, PTFE, .5, 25MM, 100PK 6051 225-2709 FILTER, PTFE, 2.0, 37MM, W/PMP, 50PK 7301 225-2714 FILTERS, PTFE, 25MM, 100PK 5444 225-2726 FILTER-PTFE, 25MM, 100PK 6587 225-2748 FILTER, PTFE, 2.0, 47MM, 50PK 5266 225-2749 FILTER, PTFE,1.0,47MM,50 PK 4266 225-2753 FILTER, PTFE, 47MM, 50PK 7479 225-28 PAD, SUPPORT, 25MM (PK/100) 254 225-2901 SUPPORT PAD, P-PLASTIC, 25MM 100PK 504 225-2902 SUPPORT PAD, P-PLASTIC , 37MM 100PK 794 225-2903 PAD, CELLULOSE, 47 MM, 100PK 445 225-2LF CASSETTE, 2-PC, LEAK-FREE, 10PK 183 225-3-01 CASSETTE, MCE, BANDED, 37MM, 50PK 1330 225-3-01A CASSETTE, MCE, BANDED, 37MM, 500PK 12834 225-3-01NB CASSETTE, MCE, NOTBANDED, 37MM 50PK 1205 225-3-02 CASSETTE, MCE, .8, MTCH, 50 PK 3490 225-3-12A CASSETTE,MCE,.8,25MM,3PC, 50PK 1339 225-3-23 CASSETTE W/COWL, 50PK 731 225-3-25LF CASSETTE, 3-PC, SURE-SEAL, 50 PK 1892 225-3-RB CASSETTE PLUGS, RED/BLUE 100PK 187 225-300R CASSETTE SPCR, STYRENE, 25MM, 50PK 759 225-304 CASSETTE SPCR, STYRENE,37 MM, 50 PK 647 225-3050LF CASSETTE, 3PC, LEAK-FREE, PK50 767 225-308 CASSETTE, 2 PC,CONDUC, 37MM,50PK 977 225-309 CASSETTE, 3 PC CONDUC,ETS 50PK 1266 225-3100 CASSETTE, MCE 0.8, 25 MM, 50PK 3070 225-317 CASSETTE, DPM W/O CONE, 10PK 7544 225-32 CASSETTE-2PC, SWINNEX (PK/10) 1946 225-3201 GASKET 13MM (PK/100) 1107 225-321 CASS, MCE, BESTCHEK, 25MM, 50PK 1138 225-321A CASS, MCE, BESTCHEK, .25MM, 50PK 1200 225-322 CASSETTE, MCE, MICROVAC (PK/1) 76 225-3250 CASSETTE-OMEGA, 3-PC,37MM, 250PK 3659 225-326 CASS, MCE, BESTCHEK, .8, 25MM, 50PK 1356 225-327 CASS, MCE, BESTCHEK,FOR TEM, 50PK 1647 225-329 CASSETTES, CONDUCTIVE, 25MM, 50PK 999 225-334 FILTER, MCE, 37MM, BLK-GRID, 100PK 1531