ASTM D7365-09a (2022) PDF

Full title and description

St ASTM D7365-09a (2022) — Standard Practice for Sampling, Preservation, and Mitigating Interferences in Water Samples for Analysis of Cyanide. This practice provides guidance for field sampling, sample preservation, container selection, and procedures to detect or suppress analytical interferences that affect measurement of available, free and total cyanide in aqueous matrices.

Abstract

ASTM D7365-09a(2022) is a practice standard addressing proper collection and preservation of water samples intended for cyanide analysis and describing techniques to mitigate known chemical interferences. It outlines recommended container materials, preservatives, pH control, immediate field treatments, and documentation and quality-control steps to improve the reliability of subsequent laboratory determinations (including methods for free, available and total cyanide). The practice complements and references common analytical methods and regulatory guidance used for cyanide testing.

General information

• Status: Active
• Publication date: May 1, 2022 (D7365‑09a (2022))
• Publisher: ASTM International
• ICS / categories: 13.060.50 — Examination of water for chemical substances
• Edition / version: D7365‑09a (2022) — reapproval/amendment of the 2009 revision
• Number of pages: 11

Scope

This practice is applicable to the collection and preservation of water samples when the intended analysis is cyanide (free, available or total). It covers recommended sample volumes and containers, field preservation (including pH adjustment and chemical preservatives), techniques for reducing or removing interferences prior to analysis, handling and transport considerations, and guidance on documentation and communication between field samplers and analytical laboratories. The practice is intended to be used alongside the specific analytical test methods selected for cyanide determination.

Key topics and requirements

• Selection of appropriate sample containers (chemically resistant glass or HDPE) and pre-cleaning procedures.
• Field preservation methods including pH adjustment and addition of preservatives to stabilize cyanide species.
• Immediate field treatments and mitigation steps for known interferences (sulfides, oxidants, metal complexes, oxidizing disinfectants, etc.).
• Recommendations to consult the analytical laboratory in advance for required sample volume and preservation specific to the chosen laboratory method.
• Documentation and chain-of-custody requirements, plus recording of field conditions and any treatments applied.
• Safety and disposal precautions for toxic reagents used in preservation and interference tests.
• Guidance on performing and documenting any non-standard mitigation techniques, with requirement for laboratory demonstration of method performance when alternative techniques are used.

Typical use and users

Used by environmental field samplers, municipal and industrial wastewater monitoring teams, environmental laboratories, consulting firms, regulatory compliance staff, mine and process effluent managers, and researchers conducting water quality assessments where cyanide analysis is required. It is frequently referenced when preparing samples for EPA or other regulatory cyanide test methods.

Related standards

This practice references and is commonly used with ASTM and other methods for cyanide and water quality analysis, including (but not limited to) ASTM test methods for cyanide determinations and reagent water specification standards; EPA cyanide test methods; and sampling practice standards for collection of water and wastewater. It is maintained under ASTM Committee D19 (Water) and Subcommittee D19.06 (Methods for Analysis for Organic Substances in Water).

Keywords

cyanide, available cyanide, free cyanide, total cyanide, sampling, preservation, sample containers, interferences, mitigation, field treatment, water analysis, pH adjustment, preservatives, chain-of-custody

FAQ

Q: What is this standard?

A: It is an ASTM practice (D7365‑09a(2022)) that gives field and laboratory guidance for sampling, preserving, and mitigating interferences in water samples intended for cyanide analysis.

Q: What does it cover?

A: It covers container selection and preparation, field preservation (including pH control and chemical preservatives), procedures to detect and mitigate known interferences, documentation and communication with the analytical laboratory, and safety considerations for handling cyanide-related reagents.

Q: Who typically uses it?

A: Environmental field samplers, analytical laboratories, municipal and industrial monitoring programs, environmental consultants, regulatory agencies and researchers involved in cyanide testing and water-quality compliance.

Q: Is it current or superseded?

A: The currently approved edition is D7365‑09a(2022), approved May 1, 2022. This reflects the 2009 revision with subsequent reapproval/amendment recorded in 2022; users should confirm they have the D7365‑09a(2022) edition when procuring the standard.

Q: Is it part of a series?

A: Yes. It is part of ASTM Committee D19 water analysis guidance and is intended to be used alongside specific analytical test methods for cyanide (ASTM and EPA methods and related ASTM sampling and reagent-water standards).

Q: What are the key keywords?

A: Cyanide, free cyanide, total cyanide, available cyanide, sampling, preservation, interferences, mitigation, water analysis, sample containers, pH adjustment.