Cat. no. SRK15L EnviroTrans™ Neutralizing Buffer, 16.5x101mm Polypropylene Tube with 88.9mm length swab, 5ml 20 tubes/box
Cat. no. SRK20 EnviroTrans™ Neutralizing Buffer, 15x75mm Polypropylene Tube with 69.9mm length swab, 2ml 20 tubes/box


Hardy Diagnostics EnviroTrans™ Neutralizing Buffer is designed for sampling surfaces as a part of the HACCP (Hazard Analysis Critical Control Point) systems and other environmental monitoring plans. The EnviroTrans™ Neutralizing Buffer is a self-contained system intended to collect samples from work surfaces, utensils or other industrial apparatus (i.e. pump impellers, gaskets, etc.).

This product is not intended to be used for the diagnosis of human disease.


Hardy Diagnostics EnviroTrans™ Neutralizing Buffer is a self-contained unit which includes a sterile Dacron swab, attached to the lid, and a tube containing 2ml or 5ml of Neutralizing Buffer.

Quaternary ammonium compounds are molecules which contain a nitrogen atom with four other atoms bonded to it. Most quaternary ammonium compounds are organic compounds and have biological activity. These compounds often work well as disinfectants, offering bactericidal and bacteriostatic effects.

Neutralizing Buffer, as the transport media in this unit, has the ability to neutralize the bactericidal and bacteriostatic effect of chlorine and quaternary ammonium compounds (see Chart 1). This media, however, does not promote growth. It is solely intended to facilitate survival of organisms in the sample during transport to the lab.


Ingredients per liter of deionized water:*

Aryl Sulfonate Complex 5.0gm
Sodium Thiosulfate 160.0mg
Potassium Phosphate 42.5mg
Sodium Hydroxide 8.0mg

Final pH 7.2 +/- 0.3 at 25ºC.

* Adjusted and/or supplemented as required to meet performance criteria.


Storage: Upon receipt, store at 2-30ºC. Always keep away from direct light. Media should not be used if there are any signs of deterioration, contamination, or if the expiration date has passed. Product is light and temperature sensitive; protect from light, excessive heat and freezing.



Specimen Collection(1)

Aseptically collect sample. Collect sample by rubbing the swab over the sample area (approximately 50cm 2), reversing directions between strokes. Repeat the collection procedure three more times, returning the swab head to the Neutralizing Buffer after swabbing each area. When sampling utensils such as knives or ladles, run the swab over the entire surface of the instrument three times, as described above. If sample is not immediately taken to the lab the sample can be refrigerated for up to 24 hours prior to analysis.