ISO 10349-6:1992 Preview
Photography -- Photographic-grade chemicals -- Test methods -- Part 6: Determination of halide content
This standard was last reviewed and confirmed in 2013. Therefore this version remains current.
The method is based on weighing the test portion, dissolution in water, transfer of a 20 ml aliquot in a beaker, pipetting halide standard A or B into a second beaker, adding nitric acid solution plus silver nitrate solution to each beaker, dilution with water, transfer of the treated solutions into separate Nessler colour-comparison cylinders, and observing the turbidity of the two solutions.