[{"id": 1, "name": "European Housedust Reference", "matrix_type": "House Dust", "geographic_region": "Europe (general)", "created_at": "2026-05-16T05:30:24.911442"},{"id": 2, "name": "Seafood - Mixed Sources", "matrix_type": "Food", "geographic_region": "Europe (North Atlantic fisheries, North Sea)", "created_at": "2026-05-16T05:30:24.911445"},{"id": 3, "name": "Bottled drinking water (mixed sources)", "matrix_type": "Water", "geographic_region": "Global", "created_at": "2026-05-16T05:30:24.911446"},{"id": 4, "name": "European Housedust — Nano-Heavy", "matrix_type": "House Dust", "geographic_region": "Europe (hypothetical)", "created_at": "2026-05-16T05:30:24.911447"},{"id": 5, "name": "European Housedust — Coarse-Dominated", "matrix_type": "House Dust", "geographic_region": "Europe (hypothetical)", "created_at": "2026-05-16T05:30:24.911447"},{"id": 6, "name": "Bottled drinking water — Nano-Heavy", "matrix_type": "Water", "geographic_region": "Global (hypothetical)", "created_at": "2026-05-16T05:30:24.911447"},{"id": 7, "name": "Bottled drinking water — Coarse-Dominated", "matrix_type": "Water", "geographic_region": "Global (hypothetical)", "created_at": "2026-05-16T05:30:24.911448"},{"id": 8, "name": "Processed seafood — Nano-Heavy", "matrix_type": "Food", "geographic_region": "Europe (North Atlantic, hypothetical)", "created_at": "2026-05-16T05:30:24.911448"},{"id": 9, "name": "Packaged Meats", "matrix_type": "Food", "geographic_region": "Europe (general)", "created_at": "2026-05-17T20:02:12.574712"}]