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Principle of the Test

CertaBlue is based on rapid detection of several metabolic processes that take place within the growing organism.

The system can detect color changes through highly sensitive optical sensors. All vials are ready to use, prefilled with media and equipped with CertaBlue sensors. In most cases, the test vials can be inoculated with a non-diluted high volume sample.

The CertaBlue vials contain an optical sensor, which can detect carbon dioxide as the universal indicator for microbial growth. The sensor is placed in the bottom of the vial, where it directly detects carbon dioxide changes. CertaBlue sensors are only permeable for gases. Liquids, dyed / heavily colored products and other particles can’t falsify results.

What samples can I test?

Liquid or (semi-)solid samples in a quantity ranging from 0.1 – 9.0ml or 0.1 – 9.0gr can be added to the CertaBlue test vials. Contact your CertaBlue distributor for specific product testing protocols.

Incubation time

Highly contaminated samples rapidly detect bacteria (typically in 8-12 hours), yeast (16-24 hours) and mold (24-35 hours), providing timely warning of contamination.

Microbial limit procedure

CertaBlue uses the dilute-to-specification procedure, which requires diluting the sample to product release specifications or in-process action levels. If growth is detected, the sample fails; if there is no detection, the sample passes (i.e., the counts are below the specification limit).