Detection of Alicyclobacillus spp. in the NAB area by means of liquid pre-enrichment and streak.
All clear, non-alcoholic drinks and raw material samples.
Qualitative detection of Alicyclobacillus spp. by means of liquid enrichment and streak plate.
Cloudy Hefeweizen beer samples from the fermentation tank to the filled bottle.
Preliminary microscopic analysis for obligate beer-spoilage organisms and wild yeasts with subsequent enrichment.
Qualitative detection of harmful osmophilic and osmotolerant yeasts, moulds and bacteria in NAB raw material samples.
Raw material samples (e.g. fruit juice concentrates, sugar syrup, etc.) in the non-alcoholic beverage section.
Detection of harmful osmophilic and osmotolerant yeasts, moulds and bacteria by means of liquid pre-enrichment.
Two-stage enrichment for the detection of harmful yeasts and bacteria in cloudy, non-alcoholic beverages using liquid pre-enrichment and pouring plate
All cloudy, non-filterable, non-alcoholic drinks with a pH value < 4.3.
Detection of harmful yeasts and bacteria using liquid enrichment and pouring plate.
Detection of harmful osmophilic and osmotolerant yeasts, moulds and bacteria in NAB raw material samples
Raw material samples (e.g. fruit juice concentrates, sugar syrup, etc.) in the NAB area
The microorganisms should be quickly transferred from the lag phase to the log phase by the liquid pre-enrichment and then visualised as a colony in the agar plate.
Membrane filtration is a simple way of concentrating microorganisms from a liquid sample.
Filtered beers
Membrane filtration and anaerobic incubation