Extraction starts with lysis, which releases nucleic acid using chaotropic salts such as guanidinium thiocyanate together with detergents, proteinase K or mechanical bead beating for tough samples. In magnetic particle methods, silica-coated or carboxyl-coated beads bind nucleic acid in the presence of high salt and alcohol; a magnetic rod or plate collects the beads while wash buffers remove proteins, salts and PCR inhibitors, and a low-salt elution buffer releases the purified nucleic acid. Silica membrane and glass fibre columns work on the same chemistry but rely on vacuum or centrifugal flow through a membrane. Automated platforms move plates, tips and magnetic rods between heating, mixing, washing and elution positions. Where an internal control and DNase treatment are used, the eluate may be ready for quantitative PCR without further cleanup.
- Magnetic Bead Nucleic Acid Extractor — A benchtop magnetic bead extractor processes 1 to 32 samples per run by moving magnetic rods through plates of lysis, wash and elution buffers.
- 96-Well High-Throughput Extraction Platform — A 96-well extraction platform purifies up to 96 samples in parallel on deep-well plates, using magnetic rods or silica plates with programmable heating and mixing.
- Automated Liquid Handling Extraction Workstation — An automated liquid handling workstation performs lysis, binding, wash and elution by programmable pipetting on a robotic deck, integrating extraction with normalisation, pooling and library preparation steps.
- Vacuum Manifold Column Purification System — A vacuum manifold system purifies nucleic acid on silica spin plates or columns under vacuum, processing 24 to 96 samples at low equipment cost.
- Field-Portable Nucleic Acid Extractor — A field-portable extractor purifies DNA or RNA at the point of sampling using battery-powered magnetic bead cartridges, so that samples need not be transported cold.
How do I choose the right variant?
Selection begins with sample type and volume, since blood, tissue, swabs, stool and plant material differ greatly in lysis difficulty and inhibitor content. Determine the required throughput in samples per run and per day, then choose between magnetic bead platforms for flexibility, 96-well plates for parallel processing, and vacuum manifolds for low-cost manual workflows where a centrifuge is already available. Check whether the chemistry is supplied as open kits or proprietary cartridges, because this controls cost and method development freedom. Elution volume should match downstream needs: quantitative PCR tolerates 50–100 µL eluate, while low-input library preparation often requires a concentration step. Confirm cross-contamination control, barcode tracking, UV decontamination, audit trails and the availability of validated protocols for your matrices.
Nucleic Acid Extractors are specified in molecular diagnostics sample preparation, pathogen detection in food and water, plant and seed genotyping, environmental DNA and microbiome studies and forensic and biobank sample processing.
Which standards and certifications apply?
Work with Nucleic Acid Extractors is commonly governed by ISO 20395, ISO 22174, ISO 15189, IEC 61010-1, CLSI MM03 and GB/T 19495.3. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
What are the key considerations before purchase?
Place the extractor away from post-amplification areas to avoid amplicon contamination, and keep pre-PCR and post-PCR rooms physically separate. Perform daily contamination checks with no-template controls, clean the deck and magnetic rods with 70% ethanol or a validated decontaminant, and replace worn O-rings or rods. Verify yield and purity at installation and after service using a reference sample, and monitor the ratio of absorbance or fluorescence values over time as a trend indicator. Eluates are usually stored at 2–8 °C for short periods or below −20 °C for longer storage; repeated freeze-thaw cycles reduce integrity. For clinical use, extraction performance should be part of the assay validation under ISO 15189, including limit of detection and precision studies.
