Seaweed Extracts

Buying whole seaweed means buying everything the plant carried — the fraction you want, plus the salt, fibre and colour you may not. An extract reverses that trade: less biomass, more molecule. Eata Marisource supplies seaweed extracts at three levels of refinement — crude concentrates that keep the full phytochemistry, standardised grades pinned to a single marker, and purified fractions narrowed to a molecular-weight window — so the material arriving at your bench or plant already matches the step it is entering.

Route matters as much as raw material. Hot water is gentle but dilute; alkali dissolves the alginate fraction cleanly yet demands viscosity control; enzymes crack cell walls at low temperature and leave delicate actives whole. Solvent polarity, pH, heat and residence time decide what comes across and what stays behind. Because those choices sit with us, we make them against your specification rather than a house default — and the certificate that follows each lot records which route produced it.

Why formulators move from powder to extract

• Dosing by marker, not by biomass — a standardised extract holds the active level constant even though the harvest behind it moves with the seasons.
• Solubility engineered in — clarification and de-salting remove the grit, fibre and salt that limit how completely a whole powder disperses.
• Concentration — a few kilograms of extract can carry the marker load of several hundred kilograms of raw weed, which matters anywhere tank space is tight.
• A cleaner downstream — less colour, odour and ash left for your own process to strip out later.

Extraction routes and what they favour

Each route opens a different door in the cell wall. We run all of the routes below, and more than one can be combined on the same biomass when a project calls for it.

The extract line-up

The grades below account for most of what we ship. Marker ranges are typical of commercial material; each lot is released against the narrower window agreed for it.

From crude liquor to finished form

Four steps stand between the extraction tank and a sealed pack, and each one can be tuned:

1. Clarification. Screening and centrifugation lift out fibre, sand and suspended solids immediately after extraction.
2. Concentration. Vacuum evaporation takes water off at temperatures gentle enough to spare the polysaccharides; liquor leaving this stage is either finished as a liquid concentrate or sent to drying.
3. Drying. Spray drying yields the free-flowing, fully water-soluble powders most formulators ask for; freeze-drying suits heat-shy fractions and produces a light, brittle, porous flake; drum drying gives the flake and granule grades familiar from fertiliser lines.
4. Finishing. Milling, sieving, blending into the agreed window, then sampling and release.

Where our extracts are at home

• Biostimulant and fertiliser manufacture — kelp concentrates and enzymatic hydrolysates serve as the active base of foliar, fertigation and soil-conditioner lines.
• Cosmetic and personal care development — fucoidan and phlorotannin fractions carried into serum, mask and gel bases for antioxidant and moisture-binding testing.
• Biomaterials work — alginate grades for hydrogel beads, sponges and cast films, with ulvan and fucoidan as blend partners in scaffold studies.
• Fermentation and biocatalysis — laminarin and oligosaccharides as defined carbon sources and elicitors in culture work.
• Aquaculture and animal nutrition trials — polysaccharide inclusions studied in feed formulation programmes.
• Analytical laboratories — reference-grade extracts for method development and instrument calibration.

What the specification sheet carries

• Marker content by HPLC, Folin–Ciocalteu or gravimetric assay — with the method stated, not assumed.
• Molecular-weight distribution by GPC/SEC wherever a grade is fractionated.
• Viscosity and, for alginates, M/G ratio checked against calcium gel strength.
• Solids, moisture and the pH of a 1% solution.
• Ash, sulphate and residual solvent where the route makes them relevant.
• Heavy metals — arsenic, cadmium, lead, mercury — by ICP-MS, with a microbiology panel available for sensitive end uses.
• Harvest origin, species and extraction route printed on every certificate.

Built to your route, not ours

Standard grades answer standard questions; development work rarely is one. Tell us what the process assumes and we will work backwards from it:

• Route and solvent selection matched to the fraction you are actually buying.
• Standardisation to one or several markers, or fractionation to a defined molecular-weight window.
• Decolourised, deodorised and low-ash variants for cosmetic and other sensitive work.
• Formats from 250 g evaluation packs through 25 kg units to 1,000 kg totes; liquids filled from 25 L drums to 1,000 L IBCs, labelled to your brand.

Name the fraction, the marker level and the format your process assumes. We will answer with the closest standard grade, the adjustment needed to hit your window exactly, and an evaluation sample to prove the match before any volume commitment.

For Research or Industrial Raw Materials, Not For Personal Medical Use!