Low cfDNA Yield Due to Improper Reagent Handling

Symptom

Cell-free DNA extraction yields are lower than expected. This may manifest as insufficient DNA concentration measured by fluorometry or qPCR, preventing downstream analysis.

1. 1 Monarch Mag Beads M2 used directly from 4°C storage without warming to room temperature
2. 2 Buffers improperly prepared with incorrect concentrations or volumes
3. 3 Incorrect buffer added at specific protocol steps
4. 4 Reagents stored at improper temperatures affecting performance

1. 1 Allow Monarch Mag Beads M2 to warm to room temperature before use
2. 2 Verify buffer preparation according to protocol specifications and confirm correct volumes
3. 3 Cross-check buffer addition at each step against the protocol
4. 4 Store all components at appropriate conditions (Beads at 4°C, verify other reagent storage requirements)

Related Video (2)

Thermo Fisher Scientific ★ 88

How to Isolate Cell-Free DNA from Plasma | cfDNA Purification

"Demonstrates the exact cfDNA isolation workflow from plasma using the MagMAX kit, directly showing correct reagent handling and bead use relevant to the failure."

Thermo Fisher Scientific ★ 60

What Is Cell-Free DNA (cfDNA)? - Seq It Out #19

"Provides context on what cfDNA is and its applications, useful for understanding why low yield matters, but does not show the technique itself."