ISO 16140-2-2016 PDF

Full title and description

Microbiology of the food chain — Method validation — Part 2: Protocol for the validation of alternative (proprietary) methods against a reference method. This part of ISO 16140 specifies the general principle and the technical protocol for validating alternative (mostly proprietary) microbiological methods used in the analysis (detection or quantification) of microorganisms in food, feed and related environmental samples.

Abstract

ISO 16140-2:2016 defines a two‑phase validation approach (method comparison study and interlaboratory study) with separate procedures for qualitative and quantitative methods. It is intended for organizations performing method validation and is primarily applicable to bacteria and fungi in products for human consumption, animal feed, environmental monitoring in food/feed production and samples from primary production. An amendment (Amd 1:2024) updates aspects of qualitative data evaluation, relative level of detection calculations, relative trueness interpretation and adds a commercial sterility testing protocol for specific products.

General information

• Status: Published; confirmed in ISO's systematic review cycle (standard remains current).
• Publication date: June 2016 (catalogue entries commonly show 17 June 2016 as the publication date).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 07.100.30 — Food microbiology.
• Edition / version: Edition 1 (2016); Amendment 1 published 2024 (ISO 16140-2:2016/Amd 1:2024).
• Number of pages: Main standard: 66 pages; Amendment 1 (2024): 26 pages.

Scope

Applies to the validation of alternative (often proprietary) microbiological methods for detection or quantification of microorganisms in food and feed matrices, related environmental samples and primary production samples. The document provides the technical protocol and statistical approaches for method comparison and interlaboratory validation studies; it is focused primarily on bacteria and fungi, with some clauses applicable to other microorganisms or metabolites on a case‑by‑case basis.

Key topics and requirements

• General principles for validating alternative (proprietary) microbiological methods against a specified reference method.
• Two‑phase validation: method comparison (laboratory or single‑laboratory comparison) and interlaboratory study (multi‑laboratory performance assessment).
• Separate protocols and statistical treatment for qualitative (presence/absence) and quantitative (enumeration) methods.
• Performance characteristics covered (e.g., relative trueness, detection capability/sensitivity, specificity); updated calculation and interpretation rules included in Amendment 1 (2024).
• Requirements for study design, sample selection, contamination/inoculation levels, data reporting and acceptance criteria to support method claims.
• Provision for inclusion of a commercial sterility testing protocol for specific products in the amendment.

Typical use and users

Primary users are method developers and manufacturers of commercial (proprietary) test kits, expert validation laboratories, accreditation and conformity assessment bodies, food/feed testing laboratories, competent authorities and food/feed business operators seeking validated alternative methods. The standard provides data and procedures to support method certification, acceptance by end users and regulatory/compliance considerations.

Related standards

ISO 16140-2 is part of the ISO 16140 series (Method validation for microbiology of the food chain). Key related parts include ISO 16140-1:2016 (Vocabulary), ISO 16140-3:2021 (verification in a single laboratory), ISO 16140-4:2020 (single‑laboratory validation), ISO 16140-5:2020 (factorial interlaboratory validation) and ISO 16140-6:2019 (validation of alternative confirmation and typing methods). These parts form a coordinated framework for validation and verification activities.

Keywords

method validation, microbiology of the food chain, alternative methods, proprietary methods, reference method, method comparison, interlaboratory study, relative trueness, detection capability, RLOD, validation protocol.

FAQ

Q: What is this standard?

A: ISO 16140-2:2016 specifies a protocol for validating alternative (mostly proprietary) microbiological methods by comparing them to a reference method, including both method comparison and interlaboratory study phases.

Q: What does it cover?

A: It covers the technical procedures, study designs and statistical evaluations needed to assess performance characteristics (detection, enumeration, relative trueness, etc.) of alternative methods for bacteria and fungi in food, feed and related environmental samples; Amendment 1 (2024) updates several statistical and evaluation rules and adds a sterility testing protocol for certain products.

Q: Who typically uses it?

A: Method developers and manufacturers, validation laboratories, accreditation bodies, testing laboratories, regulatory authorities and food/feed business operators who need objective, reproducible evidence that an alternative method performs acceptably versus a reference method.

Q: Is it current or superseded?

A: The 2016 edition (Edition 1) is the current published version; it was confirmed through ISO's review process and has a published Amendment 1 (2024) that updates key evaluation procedures. Users should apply the base standard together with Amendment 1 where applicable.

Q: Is it part of a series?

A: Yes — ISO 16140-2 is part of the multipart ISO 16140 series on method validation for microbiology of the food chain; other parts define vocabulary, single‑lab and multi‑lab validation/verification and confirmation/typing validation.

Q: What are the key keywords?

A: Method validation, alternative methods, reference method, food microbiology, interlaboratory study, method comparison, relative trueness, detection capability (RLOD).