ISO 6206:1979

Overview

ISO 6206:1979 - "Chemical products for industrial use - Sampling - Vocabulary" is an international standard that defines, in English and French, the most frequently used terms for sampling chemical products. It groups definitions into practical categories to promote consistent use of terminology across industry, laboratories and regulatory contexts. The standard is concise (7 pages) and references ISO 3534 (Statistics - Vocabulary and Symbols) for statistical terminology.

Key topics

ISO 6206 organizes and defines sampling vocabulary under four main headings:

• General terms
  • Sampling unit, increment, sample, representative sample, sampling plan, consignment.
  • Notes on multistage sampling and cost/effort considerations for acceptable sampling error.
• Hierarchy of sampling terms
  • Lot, batch, subsampling unit, primary/bulk/blended/weighted/reduced/final samples.
  • Laboratory sample, reference sample, storage sample, test sample, test portion, characteristic, test/observation.
• Terms related to taking a sample
  • Spot (snap) sample, geometric sample, cross-sectional, directional, surface/bottom/upper/middle/lower samples.
  • Continuous vs intermittent sampling, sample size reduction (sample division), particle size reduction.
• Statistics of sampling
  • Terminology aligns with ISO 3534 for statistical concepts used in sampling design and evaluation.

Practical applications

ISO 6206 is a vocabulary resource rather than a procedural specification - its practical value is in ensuring clarity and consistency when developing sampling procedures, writing specifications, or interpreting sampling results. Typical uses include:

• Writing or reviewing sampling plans and procurement contracts for chemical consignments.
• Preparing laboratory instructions and test reports to ensure consistent naming of samples (e.g., laboratory vs reference sample).
• Supporting quality assurance / quality control (QA/QC) programs by clarifying what is meant by terms such as “representative sample,” “bulk sample” or “test portion.”
• Assisting in dispute resolution and regulatory compliance where precise terminology affects acceptance criteria or legal interpretation.
• Integrating sampling language into training materials for sampling technicians and laboratory staff.

Who should use this standard

• QA/QC managers and laboratory supervisors in the chemical industry
• Sampling technicians and process engineers
• Procurement specialists and inspectors handling consignments
• Standards writers, regulators and accreditation bodies
• Technical authors preparing test methods and contracts

Related standards

• ISO 3534 - Statistics - Vocabulary and Symbols (referenced for sampling statistics terminology)

Keywords: ISO 6206, sampling vocabulary, chemical products sampling, sampling plan, representative sample, sample size reduction, industrial chemical sampling.