Test paper for the quantitative determination of halide ions. This test is based on a reaction between the halide ions NaCl and a coloured silver salt, which is decolourised by the reaction. Although the paper will react with all of the above halides, it is most frequently used for the determination of chloride and thus, indirectly, for the detection of NaCl. It is for this purpose that SALTESMO paper is specially recommended. Cyanide and thiocyanate also bleach the brown colour. fluoride ions do not interfere.Limit of sensitivity: SALTESMO permits the semi-quantitative determination of NaCl. Gradations: 0 - 0.25 - 0.5 - 1 - 2 - 3 - 4 - 5 g/l NaCl (each package is supplied with a comparison scale).