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Subcommittee Working on Standards for Cyanide in Water

Subcommittee D19.06 on Methods for the Analysis of Organic Substances in Water has developed and is currently working on several standards related to the determination of cyanides in water. The subcommittee invites all interested parties to participate in the following standards activities.

ASTM standard D 2036, Test Methods for Cyanide in Water, is currently being revised to include quality control requirements as well as new sample preparation and determinative steps using modern instrumentation. Standard D 4374, Test Methods for Cyanides in Water — Automated Methods for Cyanide, Acid Dissociable Cyanide, and Thiocyanate, is also being revised.

There is also a new standard under development, WK4058, to measure aquatic free cyanides that are present at a pH ranging from pH 6 to pH 8. With so many test methods for cyanide and their corresponding terminology, the subcommittee developed D 6696, Guide for Understanding Cyanide Species, which provides a general understanding of the chemical forms of cyanide and how they are related to environmental fate and transport. Recently, technical changes have been proposed to improve accuracy of the definitions of D 6696.

Finally, the United States Environmental Protection Agency recently proposed that standard D 6888, Test Method for Available Cyanide with Ligand Displacement and Flow Injection Analysis Utilizing Gas Diffusion Separation and Amperometric Detection, be approved for compliance monitoring at 40 CFR Part 136. If the rule is promulgated, it will allow the standard to be used under the National Pollution Discharge Elimination System permitting program of the Clean Water Act.

For further technical information, contact John Sebroski (phone: 412/777-3420). Committee D19 on Water meets Jan. 16-20, 2005, at the Comfort Inn and Suite Resort; Cocoa Beach, Fla. For membership or meeting details, contact Len Morrissey, ASTM International (phone: 610/832-9719). //

Copyright 2004, ASTM International