AVM®

AVM®: Linden Grain medium

Döhler’s Linden Grain Medium – Easy, flexible, reliable and vegetable-based

You can use AVM® as a standardised culture medium for:

  • validation of aseptic filling lines
  • regular revalidation
  • validation following maintenance or servicing on the line
  • challenge tests for checking the function of individual device components

Product description

AVM® – Aseptic Validation Medium – is the registered brand name of the Linden Grain medium in the Döhler Microsafety Design® portfolio.

This medium allows standardised detection of beverage-spoiling bacteria, yeast and mould for validating aseptic filling lines for beverages with a pH value of between 4.0 and 6.5, such as soft drinks, juices and even dairy products.

In the production of beverages with a low acid content, the filling process and the filling line itself may be a source of contamination with beverage-spoiling microorganisms. 

To allow possible weak points to be recognised, the filling process on aseptic lines needs to be examined and validated during commissioning or if major changes are made, such as in maintenance or service. In addition, annual revalidation is recommended even for unchanged filling processes in order to discover any contamination sources early on.
 

Validation should be conducted with standardised products of standardised quality to guarantee that the results are comparable and reproducible. The use of AVM® is not merely based on microbiological investigation of random samples of finished products and statistical extrapolation of the results – furthermore, it assesses the entire filling process. This allows trace and scattered infections to be detected, too.

AVM® has an ideal nutrient composition and allows the pH value to be set flexibly for certain product variations.

AVM® is available in four product varieties:

AVM® Liquid is a ready-to-use, purely vegetable-based, liquid Linden Grain medium for immediate use, and is provided in a tank train.

AVM® Concentrated Broth is a liquid, five-fold concentrated Linden Grain medium delivered in a container. The pH value of the concentrate needs to be set through dilution with water once the ready-to-use medium has been produced.

AVM® veg Powder is a Linden Grain medium in powder form for the production of a liquid medium. Using purely vegetable-based raw materials prevents animal-based ingredients from being introduced into the beverage production process. The pH value adjustment makes it possible to detect beverage-spoiling microorganisms in slightly sour beverages. It is available in 20 kg units in sealed plastic buckets.

AVM® Powder is a Linden Grain medium in powder form for the production of a liquid medium. It is available in 20 kg units in sealed plastic buckets. The pH value is also set individually by the customer.

AVM® offers you the following user benefits: 

  • Flexible formats for immediate use – ready-to-use or five-fold concentrated liquid medium for immediate use, or standard or vegetable-based powder with excellent solubility and simple handling for storage and use as needed.

  • Time saving – standardised, ready-mixed medium, tested for functionality, made from strictly-checked raw materials for individual pH value adjustment
  • Fast detection – detection after 5-7 days of incubation thanks to the medium's ideal composition 
  • Maximum efficiency – simple handling for fast approval

Order information

Product nameOrder numberDescriptionContent
AVM® Broth2.04705.050Liquid, purely vegetable-based Linden Grain medium
Application: Qualitative detection as part of
validation of aseptic filling facilities
Min. 3 tonnes (tank train)
AVM® Concentrated Broth2.04755.521 Concentrated liquid, purely vegetable-based Linden Grain medium
for production of AVM® broth
Min. 3 tonnes (container)
AVM® veg Powder8.50872.872Easily soluble, purely vegetable-based powder for production of
AVM® veg Broth – liquid Linden Grain medium

20 kg (bucket)

AVM® Powder2.04704.872Easily soluble powder for production of
AVM® Broth – liquid Linden Grain medium

20 kg (bucket)

Basic information for AVM® Liquid

pH valueIncubation T [°C]Duration (days)
4.0-4.426-305-7

Storage and shipping information for AVM® Liquid

Storage temperature T [°C]Shelf life (days)
4-83-4

Packaging information for AVM® Liquid

QuantityPackaging
Min. 3 tonnesTank truck

Basic information for AVM® Concentrated Broth

pH valueIncubation T [°C]Duration (days)
max. 5.0;
Adjustment
by customer
26-305-7

Storage and shipping information for AVM® Concentrated Broth

Storage temperature T [°C]Shelf life (days)
4-83-4

Packaging information for AVM® Concentrated Broth

QuantityPackaging
Min. 3 tonnesContainer

Basic information for AVM® veg Powder

pH valueIncubation T [°C]Duration (days)
Adjustment in line with specification
at customer premises,
pH values between
4,3 ± 0,2
26-305-7

Storage and shipping information for AVM® veg Powder

Storage temperature T [°C]Shelf life (months)
4-86

Packaging information for AVM® veg Powder

QuantityPackaging
20Plastic bucket

Basic information for AVM® Powder

pH valueIncubation T [°C]Duration (days)
Adjustment in line with specification
at customer premises,
pH values between
4.0 and 6.0
26-305-7

Storage and shipping information for AVM® Powder

Storage temperature T [°C]Shelf life (months)
4-812

Packaging information for AVM® Powder

QuantityPackaging
20Plastic bucket

Please contact our distributors or Döhler directly.

LandNameAdressEmailPhone

Africa*

Dematech Pty Ltd.13 Michigan Street
Airport Industria
Capetown 7490
South Africa
info@dematechsa.com+27-(021) 385 04 83
AustraliaDirectus Australia96 Woolwich Rd
Hunters Hill
NSW, 2110
Australia
sales@directus.com.au+61 2 9844 2100
ChinaShanghai Sunny Biological Science
and Technology Co.Ltd

Room 1706
No.1619 Dalian road
Hongkou District
Shanghai
China
Zip: 200086

yanhqx@sina.com+86 021 55884753
+86 135 24671568
New ZealandDirectus New ZealandSuite 2, Level 1, Heards
168 Parnell Road
Auckland, 1052
New Zealand
sales@directus.co.nz+64 9 309 7783
USAWeber Scientific2732 Kuser Road
Hamilton, NJ, 08691
USA
info@weberscientific.com+1 800 328 8378
rest of worldDöhler GmbH

Riedstraße 7-9
64295 Darmstadt
Germany

dmd@doehler.com+49 (0)6151/306-0

*excl.: Libya, Sudan, Morocco, Mauritania, Western Sahara, Tunisia, Egypt, Algeria

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