Rhizon Soil Solution Samplers

Rhizon Soil Solution Samplers for repeatable and reliable soil moisture sampling. Measure all dissolved components in the soil solution. For successive samples from the same volume of soil or from pots and containers, they have become the researcher’s favourite. Made from a porous and inert polymer makes them ideal for most soil solution sampling projects.

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Types of Rhizons

Macro Rhizons

Minimal disturbance of hydraulic properties of the soil

Minimal ion exchange capacity (less than soil)

pH is not changed by sampling

Complete sampling system

Sample is filtered and can be analysed directly

Inexpensive

Micro Rhizons

Used for all types of laboratory and field research

Small diameter, 2.5 mm

Cost effective for large scale use

Available as a complete set

Simple syringes act as pumps and samplers

Inert construction allows for no ion-exchange

Can be used to 1 meter depth and extended horizontally

Frost resistant

Low dead volume, 0.5 ml

Minimal disturbance to the soil

Applications

Plant uptake of soluble nutrients as nitrate
Solubility of metals in soil
Transport of soluble components in soil
Accumulation of salts, etc.
Environmental research

Specifications

Macro Rhizons

Consists of 9 cm porous material with a 4.5 mm diameter outside, strengthened by a glass fiber epoxy

Sampling is done with a syringe

Yield in water is about 10 ml/min

The yield in wet soil is typically 7 ml in 0.1 – 2 hours, depending on soil properties

Acceptable pH: 3 – 12, also depends on the corrosive properties of the soil solution

Life expectation > 6 months

Can extract soil solution from depth > 10 m

Can be extended using PVC pipe

Micro Rhizons

Bubble point > 2 bar (0.2 MPa)

Yield in water: 1 bar pressure differential: > 1 ml/min. With a 10 ml vacuum tube the yield in soil is typically 7ml in 1-16 hours (overnight), depending on soil properties

Diameter of the porous tube is 2.5 x 1.5 mm

Diameter of the PVC tube is 2.7 x 1.0 mm

Volume of the lumen 0.2 ml, total dead volume 0.5 ml

Acceptable pH: 3 – 12, also depends on corrosive properties of the soil solution

Life expectation 6 months

Accessories

Macro Rhizons

Extension pipe for MacroRhizon, length 100 cm. Set of 10 pieces

Extension pipe for MacroRhizon, length 50 cm. Set of 10 pieces

Extension tubing for MacroRhizon, length 100 cm. with connectors. Set of 10 pieces

Extension tubing for MacroRhizon, length 50 cm, with connectors. Set of 10 pieces. Including 60 cm silicone tubing 6 x 2 mm

Plastic syringe with 10 cm spacer for MacroRhizons, contents 30 ml. Set of 10 pieces

Stopcock, 2 way for sampler flushing without vacuum loss

Micro Rhizons

Silicone tubing, 6 x 2 mm, 120 cm length

Extension tubing, 1 x 3 mm, reel of 50 m

Set of needles, length 40 mm, including protection cap

Vacuum tubes

Plastic syringe with adaptor and spacer

Connectors

Resources

Manuals & Downloads

Example of Rhizon Sampling
Soil Solution
Soil Research Brochure
Web Pages
Soil solution sampling and water sampling filtration
Video Links
Rhizon Soil Solution Samplers
Understanding Soil Solution Sampling

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