BS ISO 8466-1-2021 PDF

Full title and description

STB BS ISO 8466-1:2021 — Water quality — Calibration and evaluation of analytical methods — Part 1: Linear calibration function. This entry is the British-adopted version of the international standard ISO 8466-1:2021 (BS ISO designation), which specifies the framework and procedures for linear calibration used in physicochemical and chemical analytical methods for water quality assessment.

Abstract

This standard specifies various calibration strategies for physicochemical and chemical analytical methods and gives the methods for calculation of analytical results based on a linear calibration function. It provides the statistical background and practical procedures to derive, evaluate and report linear calibration relationships so that individual water-quality analytical-method standards can refer to a common calibration approach.

General information

• Status: Published (current international edition/adopted as a British Standard).
• Publication date: ISO edition approved 17 November 2021 (ISO publication November 2021); BSI adoption published November 24, 2021.
• Publisher: International Organization for Standardization (ISO); adopted/published in BS form by British Standards Institution (BSI).
• ICS / categories: 13.060.01 — Water quality (general).
• Edition / version: Edition 2 (2021).
• Number of pages: ISO edition: 41 pages; BS-adopted publication commonly packaged with editorial front matter (commercial BS copies may show ~50 pages).

Scope

ISO 8466-1:2021 establishes the general context and statistical procedures for linear calibration functions used in the determination of analytical results for water quality. It covers selection of calibration strategies, regression and evaluation of linear fits, calculation of sample concentrations from calibration functions, and reporting of results so that method-specific standards can reference a harmonized calibration approach. The part is intended for physicochemical and chemical analytical methods that require linear calibration.

Key topics and requirements

• Definition and selection of calibration strategies appropriate for linear relationships (number and distribution of calibration points, replicates).
• Statistical treatment of linear calibration — least-squares regression, evaluation of residuals, homoscedasticity checks and tests of linearity.
• Calculation of analytical results from the linear calibration function, including propagation of uncertainty and confidence intervals for predicted concentrations.
• Acceptance criteria and performance checks relevant to calibration (e.g., goodness-of-fit, outlier handling, working range selection).
• Guidance intended to be referenced by individual water-quality analytical method standards to ensure consistent calibration practice.

Typical use and users

Used primarily by environmental and water-quality testing laboratories, method developers, accreditation bodies, regulators and standards writers. Typical activities include method validation, routine calibration of instruments and assays, quality-control reporting, and incorporation of consistent calibration practice into method-specific standards and laboratory procedures.

Related standards

ISO 8466 is a multipart series; related parts include ISO 8466-2 (calibration strategy for non-linear second-order calibration functions), ISO 8466-3 (method of standard addition) and ISO 8466-4 (estimation of limit of detection and limit of determination). Other water‑quality standards commonly used alongside ISO 8466 series (for sampling, data handling and method performance) include standards from the ISO 5667 series on water sampling and handling.

Keywords

Calibration; linear calibration function; regression; water quality; analytical methods; method validation; uncertainty; limit of detection; performance characteristics; ISO 8466.

FAQ

Q: What is this standard?

A: ISO 8466-1:2021 (published and adopted as BS ISO 8466-1:2021) is the international standard that specifies how to construct, evaluate and use a linear calibration function for physicochemical and chemical analytical methods applied to water-quality testing.

Q: What does it cover?

A: It covers calibration strategies (selection of calibration points and replicates), statistical regression and residual analysis for linear fits, calculation of sample concentrations from the calibration function, and guidance on reporting and uncertainty associated with predicted values. It provides the general context so individual water‑analysis method standards can reference a single approach to linear calibration.

Q: Who typically uses it?

A: Environmental testing laboratories, instrument manufacturers (for method validation), accreditation and regulatory bodies, and standards developers who need a harmonized statistical basis for calibration in water-quality analysis.

Q: Is it current or superseded?

A: ISO 8466-1:2021 is the current (second) edition published in 2021; it supersedes and replaces the earlier ISO 8466-1:1990 edition, which was withdrawn when the 2021 edition was issued.

Q: Is it part of a series?

A: Yes — ISO 8466 is a multipart series (parts include — at least — ISO 8466-1 through ISO 8466-4), each addressing different calibration topics such as nonlinear calibration functions, standard addition methods and limits of detection/quantification; users often apply the relevant part(s) together depending on the analytical method.

Q: What are the key keywords?

A: Calibration, linear calibration function, regression, uncertainty, water quality, analytical methods, method validation, limits of detection/quantification.