The US Environmental Protection Agency (EPA) and local Departments for Environmental Protection protocols specify filtering ground water samples with a 0.45 µm filter when analyzing dissolved or suspended metals (EPA Method 3005). Specifically designed with field sampling in mind, the Whatman Polycap™ Ground Water sampling capsule can be used as a convenient in-line filter unit.
Features and benefits
- Connects directly to outlet of a sampling pump
- Easy to use
- Filtration membrane is encapsulated in durable polypropylene housing
- Also available in 1.0 µm and 5.0 µm filters, as required by US and regional EPA test methods
- Large surface area optimized to provide at least 600 cm2 of effective filtration area to ensure rapid sample collection
- Housing components thermally fused (no glues, adhesives, metals, epoxies or extraneous materials)
- Suitable for filtration procedure outlined in EPA Method 3005 for ground water analysis
- Stepped hose barb fittings allow for connection with various size tubings
- Lot number printed on each unit for traceability
Applications
- Filter ground water samples before dissolved metal analysis
| Technical Properties - Polycap GW |
| Housing |
Polypropylene |
| Filter media |
0.45 µm: PES filter
1.0 µm: Polypropylene filter
5.0 µm: Polypropylene filter |
| Inlet/outlet |
6 to 9 mm (1⁄4 to 3⁄8 in) Stepped Barb (SB) |
| Support system |
Polypropylene |
| Vent |
On inlet |
| Filtration area |
600 cm2 (93 in2) |
| Wetting characteristics |
Hydrophilic |
| Maximum pressure |
4.1 bar (60 psi) |
| Water flow rate @ 1.0 bar (14.5 psi) |
60 l/min |
| Flow direction |
Flow should follow arrows |