Sample Collection, DNA Stabilization and Purification
Saliva, Swab and Stool Samples

PSP® - Technology

saliva sample collectionA unique sample stabilization for molecular diagnostics

The PSP® (Pre-analytical Sample Processing) products of Invitek is based on a unique non-chaotropic chemistry. It includes an integrated sample management system from sample collection to DNA stabilization.  

Reliable stabilization and storage of host and pathogen DNA in stool, saliva or swab samples at room temperature without DNA degradation.


  • Transportation, storage and purification 
  • Reliable sample collection in easy-to-handle collection
  • Preservation of bacterial titer at the time of sampling 
  • Inactivation of DNases and RNases
  • Non-invasive sample collection eliminates the risk of pathogen infections
  • No cooled transportation is needed
  • Collected samples are liquid and can easily be integrated in existing lab workflows 
  • Easy processing

PSP® Salivagene products                 

salivagene comfort kit

SalivaGene Collector

The SalivaGene Collector includes the collection devices for assisted sample collection in plastic bags for lower cost per sample. This product is offered in packages of 50 collectors or as bulk (as requested) for high sample numbers. e.g. for clinical studies. The barcode labelled primary tube is also compatible with all common robotic platforms.

SalivaGene Collection Module II

The SalivaGene Collection Module II is a simple, alternative version for saliva sample collection and stabilization using a liquid DNA stabilization buffer (DNA is also stable for 12 months at room temperature).

SalivaGene Comfort Set

The SalivaGene Comfort Set includes the collection components in a blistered package with barcode labelled primary tubes, prefilled with the stabilization buffer for easy-to-use buccal cell swab collection and DNA protection, optimal in high-throughput processing, e.g. for clinical studies. The barcode labelled tube is compatible with common robots.

If you want more information, please download the brochure or contact us directly.

Download the brochure

PSP® Stool Productsstool dna collection kit

Stool DNA Collection and Preservation

The ideal stool DNA collection and preservation tube (Stool Collection Module) - prefilled with the DNA Stool Stabilizer
simplifies stool collection and is designed to provide highest DNA yields and quality. 
The patented stabilization buffer – DNA Stool Stabilizer (PSP® technology) eliminates cooling of samples and stabilizes genomic DNA for 3 months at room temperature.
The Stool Collection Tubes prefilled with Stool DNA Stabilizer is a user-friendly stool collection and DNA protection device. It allows a convenient and hygienic collection of up to 1 g of stool, using spoon attachment.

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  • Easy stool collection and efficient DNA preservation using DNA stabilization buffer
  • Fast, painless & non-invasive sample collection
  • Reduces foul odours
  • No need to immediately process samples
  • Long-term stability of samples – highest integrity of DNA at RT
  • Stool DNA preserved for 3 month at 15 - 30°C
  • PCR - amplificable (PCR inhibitor free)
  • No cold chain during transport reducing transportation
  • Low variability between replicates compared to frozen
  • Preservation shows no bias

If you want more information, please download the brochure or contact us directly

Download the brochure

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Contact information

+31 30 6880771

Our office

Veldzigt 2A
3454 PW De Meern

ISOgen office