Microplastics Testing in Soil, Sediment, Sludge & Biosolids
Solid matrices require the polymer particles to be separated from mineral and organic material — usually by density separation and chemical or enzymatic digestion — before particles can be counted and identified.
What does it measure?
- Particle counts per unit dry mass
- Polymer identity and morphology of recovered particles
- Comparisons between locations, depths or treatment stages
When is it used?
- Agricultural soil assessment where plastic mulch, compost or biosolids were applied
- Sediment studies near outfalls, urban catchments and industrial sites
- Sludge, biosolids and compost characterisation before land application
- Site investigation supporting a nuisance or liability question
Sample considerations
- Heterogeneity is high; agree a compositing and subsampling scheme with the laboratory rather than sending a single grab.
- Organic-rich matrices such as compost or sludge need more aggressive digestion, which can affect recovery of some polymers.
- Report or allow determination of moisture so results can be expressed on a dry-mass basis.
Laboratories with relevant capabilities
- MAEON Laboratories (Chennai, Tamil Nadu) — Rubber Testing, Plastics Testing, Polymer Testing
- Japan Polymer Analytical and Research Laboratory India (Chennai, Tamil Nadu) — Polymer Testing, Rubber Testing, Chemical Analysis
- Kiyo R&D Center and Laboratory (Chennai, Tamil Nadu) — Polymer Testing, Plastics Testing, Thermal Analysis
- Chemtech-Ford Laboratories (Sandy, UT) — Environmental Testing, Water Testing, Soil Testing
Frequently asked questions
- Why does the digestion step matter?
- Removing organic matter makes particles visible and identifiable, but overly harsh treatment can degrade some polymers. Laboratories balance the two, and the approach used should appear in the report.
Confirm standard edition, jurisdiction and actual laboratory scope. Service references are not partnerships or endorsements.