Overview
SIST EN ISO 6887-5:2020 is an international standard that defines specific rules for the preparation of test samples, initial suspensions, and decimal dilutions for microbiological examination of milk and milk products. This standard is essential for laboratories and food manufacturers operating within the microbiology of the food chain, particularly those who process or analyze dairy products. The guidelines supplement the general rules covered in ISO 6887-1 by addressing products that require unique sample preparation methods. The document enhances accuracy, repeatability, and safety in microbiological testing, thus supporting the overall quality assurance in the dairy industry.
Key Topics
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Scope and Applicability
This standard covers methods for preparing samples of a wide range of dairy products, including:
- Milk and liquid milk products
- Dehydrated milk products
- Cheese and cheese products
- Casein and caseinates
- Butter
- Milk-based ice cream
- Milk-based custards, desserts, and sweet creams
- Fermented milks (yogurt, sour cream, and probiotic products)
- Dehydrated milk-based infant foods (with or without probiotics)
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Sample Preparation Procedures
The standard outlines step-by-step requirements for:
- Aseptic handling of samples
- Homogenization and mixing procedures tailored to product type
- Selection and application of suitable diluents
- Temperature control and use of water baths for sample treatment
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Use of Specific Diluents
Special attention is given to the correct use of diluents, with guidance on composition and pH adjustments, as different dairy products (e.g., cheese, caseinates) may require unique solutions for proper microbial recovery.
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Complementary Nature
This standard is intended for use together with ISO 6887-1, as it only provides additional or substitute preparation steps for products deviating from the general rules.
Applications
SIST EN ISO 6887-5:2020 has significant value in the following contexts:
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Quality Control in the Dairy Industry
Ensures the reliability and comparability of microbiological testing results for a broad range of milk-based products. Accurate sample preparation is critical for detecting pathogens and spoilage organisms, thus supporting food safety and shelf-life determinations.
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Accredited Laboratory Testing
Provides recognized procedures for laboratories serving food producers, regulators, and import/export businesses. Following standardized sample preparation methods aids compliance with international food safety regulations and trade agreements.
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Product development and Safety Assessment
Facilitates methodical microbiological evaluation during the development of new dairy formulations, including probiotic and functional foods.
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Regulatory Compliance
Assists businesses in meeting statutory or certification-related microbiological testing requirements, as referenced by national and international authorities.
Related Standards
- ISO 6887-1: General rules for preparation of initial suspensions and decimal dilutions for microbiological examination (foundation document for all food categories).
- ISO 7218: General requirements and guidance for microbiological examinations in food and animal feeding stuffs (laboratory practices).
- ISO 11133: Provides protocols for preparation, production, storage, and performance testing of culture media in food and water microbiology.
- ISO 6887-2: Specific rules for preparation of meat and meat product samples.
- ISO 6887-3: Preparation protocols for fish and fishery products.
- ISO 6887-4: Specialized preparation methods for miscellaneous food products.
- ISO 707 | IDF 50: Guidance on sampling for milk and milk products.
By adhering to SIST EN ISO 6887-5:2020, organizations can ensure consistent and scientifically robust approaches to microbiological testing across the diverse range of milk and dairy products, supporting both food safety and global market access.
