ISO 17690:2015 PDF

Scope: 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 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 to ISO 14403 and ISO 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.

ISO 17690:2015 Referenced Document

ISO 2080:2008 Metallic and other inorganic coatings - Surface treatment, metallic and other inorganic coatings - Vocabulary
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 5667-3:2012 Water quality - Sampling - Part 3: Preservation and handling of water samples
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 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
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

2015 ISO 17690:2015 Water quality - Determination of available free cyanide (pH 6) using flow injection analysis (FIA), gas-diffusion and amperometric detection