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TEST METHOD
Quantitative Suspension Test for the Evaluation of Yeasticidal or Fungicidal Activity in the Food, Industrial, Domestic and Institutional Areas
EN 1650 is an essential European Standard used to evaluate the yeasticidal or fungicidal activity for chemical disinfectants used in the food, industrial, domestic and institutional areas.
The infographic below provides a brief overview of the EN 1650 test method.
Understanding EN 1650 Testing
Application areas
This test method is applicable to the following product categories:
- Hand Hygiene Products
- General Purpose Disinfectants
Test Protocol
Step 1: Customer product is added to a mixture of the test suspension and interfering substance.
Step 2: After the selected contact time, 1 mL of the test mixture is transferred into a neutralizer containing distilled water to stop the disinfectant activity.
Step 3: After the required neutralization time, the neutralized mixture is plated and incubated. Surviving bacterial colonies are then enumerated to determine the log reduction.
The test protocol is performed under the specified conditions according to the product category and intended application.
Test Microorganisms
These are the obligatory test organisms for yeasticidal or fungicidal activity:
- Candida albicans
- Aspergillus brasiliensis (not required if testing for yeasticidal efficacy only)
Wish to add more microorganisms? Click here for our full list of microorganisms.
Contact Time & Concentration
The test concentration is chosen according to the manufacturer’s recommendation.
- The contact time recommended by the test method for hand hygiene products are 30 seconds or 60 seconds.
- The contact time recommended by the test method for general purpose disinfectants is 1 minute to 5 minutes or 60 minutes depending on the product application.
The customer can choose different contact time based on manufacturer’s recommendation.
Soiling Conditions
Interfering substances, or commonly referred to as soiling, are used to mimic organic substances found on human skin, surfaces, and instruments. These are the available soiling conditions according to the test method:
- Clean condition: 0.3 g/L bovine serum albumin
- Dirty condition: 3.0 g/L bovine serum albumin
Need help with your testing requirements?
Have questions about this test method or your product? Our technical team is here to assist you.