The SK20 uses ceramic cups made from Al203 sintered material which allows sampling and analysis for nitrate and common organic and inorganic substances.
Applications
· Continuous/discontinuous extraction
· Nitrate, chloride, sulphate, calcium, sodium, ammonium, phosphate
Benefits
· Very low dead volume
· Shaft and cup exchangeable
· pH range of 4 to 9
Limits
· Not suitable for heavy metals
Specifications
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SHAFT
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Ø 2 cm; Acrylic
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POROUS CERAMIC
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Ø 2 cm; length 6 cm
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BUBBLE POINT
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-100 kPa
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SUCTION TUBE
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PE; Ø 0.16 cm x Ø 0.28 cm
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PROTECTIVE TUBE
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PVC, Ø 1.1 cm
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ACHIEVABLE SAMPLE AMOUNTS
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Maximum: in free water and with a vacuum of -50 kPa approximately 5 mL per 10 minutes.
Minimum: in sandy loam soil with a vacuum of -50 kPa approximately 5 mL per hour.
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COMPARISONS
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PORE WATER SAMPLER
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SK20/SKS20 (Internal Shaft Storage)
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SIC20/SICS20 (Internal Shaft Storage)
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SPE20/SPES20 (Internal Shaft Storage)
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SUCTION CUP MATERIAL
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Aluminum Oxide Ceramic
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Silicon Carbide
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Porous PE-Nylon Cup
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CHEMICAL SUITABILITY
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· Anions ( Nitrate, Sulphate, Phosphate, Chloride)
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Suitable
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Suitable
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Suitable
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· Cations (Calcium, Potassium, Sodium Ammonium)
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Limited Suitability
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Suitable
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Suitable after conditioning and sufficient forerun for flushing.
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· Metals (Aluminum, Copper, Chromium, Iron, Magnesia, Nickel)
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Not Suitable
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Suitable
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Suitable
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· Heavy Metals (Cadmium, Lead)
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Not Suitable
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Limited Suitability
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Suitable
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*See Chemical Suitability Chart for more information on chemical suitability.
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BUBBLE POINT
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100 kPa
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90 kPa
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100 kPa (PE cover only allows water flow up to 20 kPa)
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