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Status : Active
Standard Type : Main
Document No : ISO 10349-6:1992
Document Year : 1992
Pages : 2
Edition : 1
Section Volume : Photography (ISO/TC 42.)
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.