Description
Each participating lab will receive two vials of highly characterized wild-type mono-nucleosomal cfDNA, enabling assessment of DNA concentration and size distribution using your routine workflows — all under real-world lab conditions.
Scheme Acronym: CS-cfDNA_2025 (Concentration and Size of cellfree DNA 2025)
Minimum required number of participants: 25
Timeline: Sample shipment is planned for late Summer/Fall 2025 (if minimum number of participants is reached)
Measurands
- cfDNA Concentration – Directly measured from the provided buffer
- cfDNA Fragment Size Profile – Evaluated to confirm integrity and distribution
Homogeneity & Stability
According to ISO 13528:2022-08
Source
HMEC-1 cells
Formulation and storage
Store at 2 - 8 °C
| VAF | 0% |
| Cell line | HMEC-1 |
| Concentration | 20 ng/µL |
| Product size | 25 µL |
| Formulation | In buffer - Tris-EDTA (10 mM Tris, 1 mM EDTA), pH 8.0 |
| Transport temperature | 2-8 °C |
| Storage temperature | 2-8 °C |
| Quality control |
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| Application |
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Product category
EQA
General description
The Interlaboratory Comparison (ILC) CS-cfDNA_2025 designed specifically for laboratories working in molecular pathology, liquid biopsy, and related fields. This ILC offers a unique opportunity to evaluate the performance of your methods for quantifying and size-profiling cfDNA and ctDNA prior to dPCR and NGS.
Take advantage of this ILC as an External Quality Assessment (EQA) tool to build confidence in your techniques and demonstrate the robustness of your cfDNA analysis methods.
Scheduled time of the ILC: late Summer/Fall 2025