Bismuth Test Paper (#90733)

In the presence of bismuth ions (Bi³⁺) this paper shows an orange-red discoloration on a pale-yellow background. A number of metal ions produce yellow spots. These do not, however, interfere with the determination of Bi. Limit of sensitivity: 60 mg/l Bi 3+ Sensitivity is reduced in the presence of nitric acid. The test solution should not contain more than 2 to 3 percent HNO ³.