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ISO FDIS 17690

2014 Edition, October 22, 2014

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WATER QUALITY - DETERMINATION OF AVAILABLE FREE CYANIDE (PH 6) USING FLOW INJECTION ANALYSIS (FIA), GAS-DIFFUSION AND AMPEROMETRIC DETECTION



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Superseded By: ISO 17690

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NOW A PUBLISHED STD * SEE ISO 17690
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Description / Abstract:

This International Standard specifies methods for the determination of available free cyanide at pH 6 in various types of water (such as ground, drinking, surface, leachate, waste water, and metallurgical processing waste water) with cyanide concentrations from 5 μg/l to 500 μg/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 (Figure A.1).

NOTE 1 ISO 2080:2008, 3.105, the concentration of available free cyanide as determined by a specified analytical method.

NOTE 2 The detection limit for this method was determined by interlaboratory testing at the national level using ASTM International D6512 Practice for Interlaboratory Quantitation Estimate.

NOTE 3 Free cyanides according ISO 14403 and 17690 are not equivalent.

In this method, two suitable mass concentration ranges from 5 μg/l to 50 μg/l and from 50 μg/l to 500 μg/l are described.
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