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  1. Chromservis
  2. Sample preparation
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IntroductionFiltrationAir sampling pumps and accessories

Sample preparation

Particle Size-selective Sampler guide

This table selection guide will help you to select Particle Sampler for inhalable, respirable or thoracic particles. Click on the pictures you can see the page with the required sampler. All samplers (other flowrates, particle size) that we have on our werbsites you can see there.

Pumps suitable for using with these samplers you can find there.

Sampler Classification Flow Rate L /min 50% Cut-point µm Recommended Calibration Device Filter Size mm Unique Features
Sampler Button Button Sampler Inhalable 4 100 Button Sampler Calibration Adapter 25 Low sensitivity to ambient air conditions
Reduces oversampling of very large particles
Hlavice IOM IOM Sampler Inhalable 2 100 IOM Calibration Adapter 25 Complies with MDHS 14/3
Meets US and international standards including the ACGIH sampling criteria for inhalable dust
Hlavice GS-3 GS-3 Cyclone Respirable 2.75
3.7		 4.0
3.5		 Multi-purpose Calibration Jar 25
37		 Overcomes sampling problems reported with Dorr-Oliver
Conductive
AL cyclone SKC Aluminum Cyclone Respirable 2.5
2.8		 4.0
3.5		 Aluminum Cyclone Calibration Chamber 25
37		 Specified in NIOSH 7500 (silica) and NIOSH 0600 (respirable particulates)
Hlavice PPI Parallel Particle Impactor (PPI) Respirable
Respirable
Thoracic		 2
8
2		 4.0
4.0
10		 Multi-purpose Calibration Jar 37-mm collection filter and 9.5-mm impaction substrate Matches collection curve more closely than any other sampler
8 L/min PPI enhances sensitivity of respirable dust measurements
DPM cassette DPM Cassette Sub-micron 1.7
2		 < 1.0 Multi-purpose Calibration Jar if used with GS-1 Cyclone 37 mm Integral precision-jeweled impactor
Tamper-evident seal
Low carbon background filters
Hlavice PEM PEM Sampler PM2.5
PM10 (thoracic)		 2
4
10		 2.5
10 		PEM Calibration cap 37 mm Referenced in EPA Method IP-10A for particles in indoor air
Hlavice Sioutas Sioutas Cascade Impactor Fractionates
2.5 µm & above
1.0 - 2.5 µm

0.5 - 1.0 µm
0.25 - 0.5 µm
< 0.25 µm		 9 > 2.5
2.5
1.0
0.5
0.25		 None required 37 after filter and 25 collection substrate Minimal particle bounce
Chemical or gravimetric analysis
Sample coarse, fine, and ultrafine particles
Hlavice IMPACT IMPACT Single-stage Impactor PM2.5
PM10
PM Coarse		 10
10
10		 2.5
10
10, 2.5		 IMPACT Cal Adapter 47 collection filter and 37 impaction substrate Follows closely EPA reference methods and criteria
Pre-oiled disposable impaction substrate
Hlavice PMI Personal Modular Impactor (PMI) PM2.5
PM10
PM Coarse		 3
3
3		 2.5
10
10, 2.5		 PMI Cal Adapter 37 collection filter and 25 impaction substrates Pre-oiled disposable impaction substrates
Suitable for thoracic TLVs®or environmental PM parameters

CA Filters

Cellulose Acetate(CA)CA Filters

  • Composition: Mixture of triacetate and diacetate
  • Characteristics:Low static charge and high strhgth
  • Sterilizable: May be repeatedly sterilized without loss of integrity or change in bubble point
  • Clean: 0.1 wt% aqueous extractables
  • Related to MCE membranes: - improved solvend resistance to low molecular weight alcohols - better heat resistance - lower protein binding
    Specifications for Cellulose Acetate (CA)
    ore Size [µm Bubble Point [MPa] Flow rate (Water)[ml/min/cm2] Flow rate (Air) [L/min/cm2] Porosity [%] Thickness [µm]
    0.20 ≥0.25 16 2 66 125
    0.45 ≥0.17 35 4 68 125
    0.80 ≥0.068 160 14 72 125
    3.00 ≥0.034 500 54 78 135

Specifications for CE
Pore Size [µm] Color Surface Bubble Point [MPa] Flow rate (Water)[ml/min/cm2] Flow rate (Air) [L/min/cm2] Porosity [%] Thickness [µm]
0.10 White Plain ≥0.24 2.7 0.67 65 110
0.20 White Plain ≥0.37 17.5 2.4 73 133
0.30 White Plain ≥0.28 30 3.7 75 114
0.45 White Plain ≥0.24 45 5.0 78 145
0.45 White Grid ≥0.16 80 8.0 79 142
0.65 White Plain ≥0.14 120 11.2 79 150
0.80 White Plain ≥0.11 165 15.0 80 150
1.00 White Plain ≥0.096 220 20.4 80 150
3.00 White Plain ≥0.070 300 28.3 81 155
5.00 White Plain ≥0.058 400 40.9 81 160
0.45 Black Grid ≥0.22 50 5.0 78 135
0.80 Black Grid ≥0.10 170 15.0 80 145
0.45 Green Grid ≥0.22 50 5.0 78 135
0.80 Green Grid ≥0.10 170 15.0 80 145

Ash Content of White Plain MCE Membrane Filters (ppm)
Al <0.2 K 6.0 Ni <5.0
Ca 140.0 Li <1.0 Pb <1.0
Cd <0.5 Mg 10.0 Si <20.0
Cr 8.0 Mn <0.5 Sn <5.0
Cu <1.0 Mo <1.0 Ti <1.0
Fe <5.0 Na 10.0 Zn <1.0

Filtration

FiltrationFilter media selection guide

there are many filtration materials used in filtration process. Filtration is mostly used in various applications, like membrane filtration of water or organic samples, syringe filters in HPLC or air sampling of dust aerosol. Table listed belwo shows most commonly used filter media. by clickin on particulate filter material you will find detailed information.

Below listed materials are used for all that in following applications:

  • Pressure filtration
  • Vacuum filtration
  • Syringe filters (mostly in HPLC and UHPLC)
  • Asbestos sampling
  • Dust aerosol sampling
  • Chemical vapours sampling
  • Determination of dissolved compounds
Membrane filters
Type Description Max. temperature Refractive index
MCE Mixed Cellulose Esters 130°C 1.5
CA Cellulose Acetate 180°C 1.47
PTFE (Hydrophilic) PTFE - -
PTFE (Hydrophobic ) PTFE 120 - 160°C -
PC Polycarbonate 140°C -

MCE Filters

Mixed Cellulose Esters (MCE)MCE Filters

  • Composition: Mixed cellulose esters includes cellulose nitrate, also known as nitrocellulose, and cellulose acetate
  • High porosity: Provide superior flow rates
  • High protein binding: Can be blocked by pretreatment or utilized in applications
  • High purity: Triton-free and non reactive to pyrogens
  • Autoclavable: Withstand autoclaving temperatures up to 130 C without adversely affecting bubble point rate or microbiological recovery
  • Rapid wetting time: <3 seconds to wet a 47 diameter disc with aqueous 1% methylene blue

Specifications for MCE
Pore Size [µm] Color Surface Bubble Point [MPa] Flow rate (Water)[ml/min/cm2] Flow rate (Air) [L/min/cm2] Porosity [%] Thickness [µm]
0.10 White Plain ≥0.24 2.7 0.67 65 110
0.20 White Plain ≥0.37 17.5 2.4 73 133
0.30 White Plain ≥0.28 30 3.7 75 114
0.45 White Plain ≥0.24 45 5.0 78 145
0.45 White Grid ≥0.16 80 8.0 79 142
0.65 White Plain ≥0.14 120 11.2 79 150
0.80 White Plain ≥0.11 165 15.0 80 150
1.00 White Plain ≥0.096 220 20.4 80 150
3.00 White Plain ≥0.070 300 28.3 81 155
5.00 White Plain ≥0.058 400 40.9 81 160
0.45 Black Grid ≥0.22 50 5.0 78 135
0.80 Black Grid ≥0.10 170 15.0 80 145
0.45 Green Grid ≥0.22 50 5.0 78 135
0.80 Green Grid ≥0.10 170 15.0 80 145

Ash Content of White Plain MCE Membrane Filters (ppm)
Al <0.2 K 6.0 Ni <5.0
Ca 140.0 Li <1.0 Pb <1.0
Cd <0.5 Mg 10.0 Si <20.0
Cr 8.0 Mn <0.5 Sn <5.0
Cu <1.0 Mo <1.0 Ti <1.0
Fe <5.0 Na 10.0 Zn <1.0