• There are no items in your cart

ISO 20950-1:2018

Current
Current

The latest, up-to-date edition.

Water quality — Determination of available weak and dissociable (WAD) cyanide — Part 1: Method using ligand exchange, flow injection analysis (FIA), gas-diffusion and amperometric detection
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

05-17-2018

This document specifies operationally defined methods for the determination of available WAD cyanide in various types of water such as drinking, ground, and surface, waters, and metallurgical processing tailings reclaim, heap leach barren, mill slurry tailings and leaching solutions, with cyanide concentrations from 5 µg/l to 2 000 mg/l expressed as cyanide ions in the undiluted sample. The range of application can be changed by varying the operation conditions, e.g. by using a different injection volume, thicker membrane, detector response, etc.

NOTE ISO 2080:2008, 3.105, defines free cyanide. The concentration of available WAD cyanide includes free cyanide and some of the metals complexed in solution as determined by a specified analytical method but not all of the metal complexes present in total cyanide (3,191).

In this method, six suitable mass concentration ranges from 5 µg/l to 50 µg/l, from 50 µg/l to 500 µg/l, from 0,5 mg/l to 5 mg/l, from 5 mg/l to 50 mg/l, from 50 mg/l to 500 mg/l and from 500 mg/l to 2 000 mg/l are described.

Committee
ISO/TC 147/SC 2
DevelopmentNote
Supersedes ISO/DIS 20950-1. (05/2018)
DocumentType
Standard
Pages
17
PublisherName
International Organization for Standardization
Status
Current

Standards Relationship
BS ISO 20950-1:2018 Identical

ISO 2080:2008 Metallic and other inorganic coatings Surface treatment, metallic and other inorganic coatings Vocabulary
ISO 17690:2015 Water quality Determination of available free cyanide (pH 6) using flow injection analysis (FIA), gas-diffusion and amperometric detection
ISO 5667-3:2012 Water quality Sampling Part 3: Preservation and handling of water samples
ISO 8466-2:2001 Water quality — Calibration and evaluation of analytical methods and estimation of performance characteristics — Part 2: Calibration strategy for non-linear second-order calibration functions
ISO/TR 19588:2017 Background information and guidance on environmental cyanide analysis
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods
ISO 8466-1:1990 Water quality Calibration and evaluation of analytical methods and estimation of performance characteristics Part 1: Statistical evaluation of the linear calibration function
ASTM D 7728 : 2011 Standard Guide for Selection of ASTM Analytical Methods for Implementation of International Cyanide Management Code Guidance
ASTM D 6888 : 2016 : REDLINE Standard Test Method for Available Cyanides with Ligand Displacement and Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection

View more information
US$111.00
Excluding Tax where applicable

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.