Biologicals for Diagnostics Development
Human serum, plasma and specialty matrices for every stage of in vitro diagnostic (IVD) development — from early assay development and calibrator matrix selection through to production-scale lot reservation for the full product lifecycle. EU and US-qualified donors, processed in Germany, IVDR documentation available.
Serum & Plasma Selection for IVD Applications
The correct serum matrix is the foundation of every IVD calibrator and control. Wrong matrix selection leads to assay bias, failed precision studies and reformulation costs. Use this guide to select the right product for your assay type.
| IVD Application | Correct Matrix | Technical Justification |
|---|---|---|
| General immunoassay calibrators (ELISA, CLIA, ECLIA) | Human Serum Standard | Representative population matrix. Pooled, mixed gender/blood type. Consistent protein composition per lot. |
| Lipemia interference study (CLSI EP7) | Human Serum Delipidated | Lipids removed, hormones retained. Correct baseline — charcoal treated serum would introduce a second variable (hormone depletion). |
| Steroid hormone calibrators (E2, testosterone, cortisol, DHEAS) | Human Serum Double Charcoal Treated | Endogenous steroids depleted to near-zero for precise analyte spiking at calibrator concentrations. |
| Autoimmune assay positive controls (ANA, ANCA, RF) | Auto-Immune Disease Controls | Patient-derived serum with characterised autoimmune markers per lot. IVD QC and positive control development. |
| Coagulation assays (PT, aPTT, fibrinogen, D-dimer) | Human Plasma (Na Citrate) | Fibrinogen and clotting factors retained — removed during serum preparation. Coagulation assays require plasma, not serum. |
| Lateral flow immunoassay development | Human Serum Standard or Plasma | Matrix depends on analyte and intended sample type. Confirm with target analyte and reference range specification. |
| Heterophilic antibody / HAMA interference testing | Human Serum Ultra-Low IgG | Reduced endogenous IgG minimises heterophilic antibody background in detection step. |
| Multiplex cytokine panel baseline | Human Serum Standard | Pooled matrix for cytokine baseline characterisation and spike-recovery experiments. |
| IVD calibrator protein stabilisation | HSA Diagnostic Grade or BSA Low Endotoxin | Albumin as protein stabiliser in liquid calibrator formulation — prevents analyte adsorption to surfaces. |
| POCT / near-patient testing matrix | Human Plasma K2 EDTA or Whole Blood surrogate | POCT instruments are validated with blood or plasma — serum matrix may not reflect intended use specimen type. |
Key Products for Diagnostics Development
Human Serum Standard
Pooled, mixed gender, mixed blood type. The baseline matrix for immunoassay calibrators. EU & US donors, processed in Germany. Lot reservation essential for lifecycle consistency.
Human Serum Delipidated
Three variants: standard (CLSI EP7 lipemia studies), IgG-free, and double charcoal (steroid assay calibrators). IVDR documentation available.
Auto-Immune Disease Controls
ANA, ANCA, rheumatoid factor — patient-derived, characterised per lot. For IVD positive control and QC reagent development.
Human Plasma
K2 EDTA and sodium citrate. Fibrinogen and clotting factors retained. For coagulation assay calibrators and plasma-matrix IVD controls.
HSA Diagnostic Grade
For calibrator stabilisation, IVD buffer protein supplement and liquid control formulation. Lot-specific quantitative data, IVDR documentation on request.
Serum Processing Services
Custom processing for IVD matrices: delipidation, charcoal absorption, IgG depletion and virus safety testing. Applied to our stock or your own lots.
Lot Reservation for IVD Manufacturers
IVD calibrators and controls are validated against a specific serum lot. When that lot runs out, every subsequent lot must pass a comparability study before it can be used — and if the performance shifts, reformulation is required.
Under IVDR, a lot change that affects calibrator performance may require notification to the notified body and update of the technical documentation. The total cost of a forced mid-production lot change:
- Comparability laboratory work: EUR 5,000–15,000
- Change control documentation: EUR 3,000–8,000
- Potential notified body review: EUR 5,000–20,000
- Production downtime: dependent on batch size
- Total: EUR 20,000–50,000 typical
SeamlessBio holds your validated lot for up to 12 months without prepayment. Call off as needed across your full product lifecycle. One email to reserve — no contracts, no minimum commitment.
Lot Reservation →IVDR Documentation Package
Available on request for all human serum products:
- Standard (every lot) — CoA, CoO, Donor Screening Report, TSE/BSE Statement, Sterility Certificate
- Extended IVDR — Lot-specific quantitative test data for key parameters
- Compliance Statement — Declaration of suitability for IVD manufacturing use
- Batch Reservation Letter — Formal lot reservation confirmation for QMS records
- Traceability Package — Full donor centre and processing traceability per lot
Frequently Asked Questions
Which human serum is best for IVD calibrator development?
For general immunoassay calibrators: Human Serum Standard (pooled, mixed gender, mixed blood type). For steroid hormone calibrators: Double Charcoal Treated. For lipemia studies (CLSI EP7): Delipidated (lipids removed, hormones retained). For coagulation assays: Human Plasma (fibrinogen retained). Each matrix choice has specific technical justification — contact us to confirm the right product for your assay platform.
Why is lot reservation critical for IVD calibrator manufacturers?
A lot change mid-production triggers change control, comparability study and potentially IVDR notified body notification. Total cost typically EUR 20,000–50,000. SeamlessBio holds your lot without prepayment — reserve once at qualification, call off across the product lifecycle.
What is the difference between delipidated and charcoal-treated serum?
Delipidated serum: lipids removed, steroid hormones retained. For CLSI EP7 lipemia interference studies. Charcoal-treated serum: lipids AND steroids removed. For steroid hormone assay calibrators where endogenous steroid must be depleted to zero before analyte spiking.
What IVDR documentation is available?
Standard per lot: CoA, CoO, Donor Screening Report, TSE/BSE Statement, Sterility Certificate. Extended on request: lot-specific quantitative data, compliance statement for IVD manufacturing use, batch reservation letter, full traceability package.
Request IVD Serum Matrices — Quote or Sample
Free test volumes. Lot reservation without prepayment. IVDR documentation on request. Response within 48 hours.
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