A guide from Lifefeng comparing DK803 and DK805 kits for oral swab DNA extraction, covering swab materials, performance, and sampling workflow.
The guide presents Lifefeng’s oral swab DNA extraction kits (DK803, DK803‑96, DK805, DK805‑96), describing swab material options, expected DNA yields, and key performance metrics such as volume loss and adsorption efficiency. It also explains the use of protection liquids (Buffer SL, Buffer SD1) for sample stability.
Experimental data comparing the kits are provided, showing DNA concentration, purity ratios, and total yield for fresh and protected samples. Recommendations are given for selecting the appropriate kit based on swab material, sample volume, and storage conditions. This manual is written in Chinese.
| Swab material | cotton, non‑woven, sponge |
|---|---|
| Volume loss when absorbing solution | 20‑30 % |
| DNA adsorption efficiency (DK803) | ≈ 90 % |
| Expected DNA yield per kit (DK803) | 4‑8 µg |
| Protection liquid stability | up to 3 months at room temperature |
The ideal swab material is a highly absorbent non‑woven fabric.
Samples can be stored for up to three months without affecting extraction performance.
The DK803 kit achieves about 90 % DNA adsorption efficiency.