By checking the extraction efficiency with larger plasma input volumes, we have shown that total cfDNA yield increases with increased input volumes processed using the CNA kit (Fig. 4a), at least until the maximum input volume of 5 mL plasma, where a small reduction in extraction efficiency may occur (Fig. 4).
Further optimization of the extraction conditions by Box Behnken design increased the extraction efficiency.
This was justified by the fact that the extraction efficiency is high for all relevant toxins (above 90%).
Prior to detection, the derivatives were enriched by headspace SPME with the extraction efficiency of the SPME fiber ranging between 65 % and 85%%.
Indeed, GITMO-WG considered each of the two criteria itself sufficient to sustain a judgment of 'predicted PM', but recognized that a poor harvest may be caused by technical problems affecting the extraction efficiency and the final yield of circulating CD34+ cells.
Fibre selection was performed by testing and comparing the extraction efficiency of six SPME fibres (Supelco) to different stationary phases and various film thicknesses, including PDMS (100 μm), PA (85 μm), DVB/CAR/PDMS (50/30 μm), CAR/PDMS (75 μm), CW/DVB (70 μm) and PDMS/DVB (65 μm).
The differences in D as well as the slope a between Pu(IV) and U IV) make it possible to design the U and Pu separation method by which one can achieve an enhancement of the extraction efficiency and selectivity by tuning the operation pressure.
The presence of PEG in the extraction medium enhanced the extraction efficiency by 39.48%.
The advantage is that a complete extraction is reached in only one step, and we further controlled the extraction efficiency by applying an internal standard before the extraction and conducting extraction of all calibration samples.
In addition, we address the scale-up behavior of mass transfer coefficients and the extraction efficiency by using reactors on the micro- and the milli-scale.
