Overview
- Applications
-
- Algae cultivation
- Phytoplankton culture
- Microalgae research
- pH range
- {'min': 8.0, 'max': 8.0}
- Notes
- Full recipe available at http://sagdb.uni-goettingen.de/culture_media/25 Artificial Seawater Medium.pdf Composition verified against https://sagdb.uni-goettingen.de/culture_media/25%20Artificial%20Seawater%20Medium.pdf on 2026-08-25 (SHA-256 0735fc07df10bd546b0e10fe21d3ee8cfad830775d7ae8e0afbba9137eb0a128).
Composition
flowchart LR
CultureMech_000189["artificial_seawater"]
ing0_NaCl["NaCl"]
CultureMech_000189 --> ing0_NaCl
CHEBI_26710["CHEBI:26710"]
ing0_NaCl -.-> CHEBI_26710
ing1_TRIS["TRIS"]
CultureMech_000189 --> ing1_TRIS
ing2_Deionized_or_distilled_water["Deionized or distilled water"]
CultureMech_000189 --> ing2_Deionized_or_distilled_water
CHEBI_15377["CHEBI:15377"]
ing2_Deionized_or_distilled_water -.-> CHEBI_15377
Ingredients (3)
| # | Ingredient | Concentration | Ontology | Notes |
|---|---|---|---|---|
| 1 |
NaCl
Cl.Na 58.443 g/mol
|
30 G_PER_L |
CHEBI:26710
sodium chloride
|
|
| 2 | TRIS | 1 G_PER_L | No exact MediaIngredientMech SSSOM mapping was available. | |
| 3 |
Deionized or distilled water
H2O 18.015 g/mol
|
944 ML_PER_L |
CHEBI:15377
water
|
Preparation
- Dissolve NaCl and TRIS in water, then add the mineral and trace stocks.
- Adjust to pH 8.0 with 1 N HCl.
- Autoclave the base medium.
- Cool and add sterile vitamin B12 and vitamin B1 stocks.
- For half-strength ASM15 use 15 g/L NaCl; agar at 15 g/L is an optional solid variant.
Solutions
MgSO4 x 7 H2O stock solution
Dose: 10 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| MgSO4 x 7 H2O | 244 G_PER_L |
KCl stock solution
Dose: 10 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| KCl | 60 G_PER_L |
NaNO3 stock solution
Dose: 10 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| NaNO3 | 100 G_PER_L |
CaCl2 x 2 H2O stock solution
Dose: 10 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| CaCl2 x 2 H2O | 30 G_PER_L |
KH2PO4 stock solution
Dose: 10 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| KH2PO4 | 5 G_PER_L |
ASM trace element solution
Dose: 6 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| EDTA | 750 MG_PER_L | |
| FeCl3 x 6 H2O | 97 MG_PER_L | |
| MnCl2 x 4 H2O | 41 MG_PER_L | |
| ZnCl2 | 5 MG_PER_L | |
| CoCl2 x 6 H2O | 2 MG_PER_L | |
| NaMoO4 x 2 H2O | 4 MG_PER_L | Source formula retained; no exact SSSOM mapping was asserted. |
| Deionized or distilled water | 1 L |
Add salts in the printed order.
ASM vitamin B12 working stock
Dose: 0.5 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| Vitamin B12 | 10 MG_PER_L | |
| Deionized or distilled water | 1 L |
Calculated from the source two-step dilution: 100 mg/100 mL, then 1:100.
ASM vitamin B1 stock
Dose: 0.5 ML_PER_L
| Ingredient | Concentration | Notes |
|---|---|---|
| Thiamine | 1.2 G_PER_L | |
| Deionized or distilled water | 1 L |
Target organisms
No target organisms are recorded.
Provenance
| Timestamp | Curator | Action | Notes |
|---|---|---|---|
| 2026-01-28T00:00:00+00:00 | sag-import | Imported from SAG Culture Collection | Source ID: Artificial_Seawater, PDF URL: http://sagdb.uni-goettingen.de/culture_media/25 Artificial Seawater Medium.pdf |
| 2026-02-03T00:00:00+00:00 | schema-defaulter-v1.0 | Applied schema defaults and normalizations | Added placeholder ingredients for missing composition |
| 2026-02-03T11:26:43.754129 | quality-tagger-v1.0 | Added data quality flag | Marked as incomplete_composition due to placeholder ingredients |
| 2026-03-13T06:18:53.500442Z | culturemech-id-assigner-v1.0 | Assigned CultureMech ID | Assigned stable identifier: CultureMech:000189 |
| 2026-03-17T19:45:04.427758+00:00 | normalize_media_names_to_snake_case.py | NAME_NORMALIZED | Normalized name from "Artificial_Seawater" to "artificial_seawater" for consistent matching |
| 2026-05-16T09:02:56.215156+00:00 | migrate_legacy_fields.py | MIGRATED_LEGACY_FIELDS | curation_history.date->timestamp=2; references.reference_id->reference=2; category->lowercase=1 |
| 2026-08-06T07:56:36.007555+00:00 | curate_placeholder_composition.py | REMOVED_PLACEHOLDER_INGREDIENT | Removed the 'See source for composition' placeholder ingredient; the record carries no imported composition and is flagged incomplete (#175). |
| 2026-08-25T00:00:00-07:00 | repair_sag_missing_compositions.py | RESTORED_SAG_SOURCE_COMPOSITION | Restored the formulation from the reviewed SAG PDF, preserving final-medium and stock-solution boundaries. Calculated stock concentrations are documented in-place. Ingredient identities were selected from the MediaIngredientMech SSSOM. |
| 2026-09-07T00:00:00-07:00 | repair_sag_missing_compositions.py | TAGGED_SAG_RESTORED_COMPOSITION_CURATED | Marked the reviewed SAG source formulation as curated and ontology-mapped after the original restoration left only the ingredient identities and did not add the scoring flags. |
| 2026-09-13T00:00:00-07:00 | repair_sag_sources_score10.py | NORMALIZED_SAG_SOURCE_SCORE10 | Copied the SAG source identity from references and the original sag-import event into the structured sources slot recognized by review scoring. |