| 摘要 |
A testing device for measuring for nickel-aerosols includes a glass tube having breakable end tips for opening the tube for the passage of a test gas therethrough and a filling in the tube which includes a closed ampoule of hydrochloric acid, a filter layer for entrapping nickel particles of the gas being tested, a reaction layer of a material impregnated with a color reagent for nickel, a granular buffer layer and a second breakable ampoule of ammonia water arranged in the direction of flow of the test gas through the tube. The testing is carried out by breaking the first ampoule to release hydrochloric acid which flows through the filter and reacts with the nickel particles which pass to the reagent layer, subsequently breaking the second ampoule so that its contents will be directed into the granular buffer layer and in the reagent layer. The ammonia water in the second ampoule is directed into the buffer layer and then into the reagent layer to produce a color reaction in the reagent layer and the intensity of the discoloration produced is proportional to the amount of nickel filtered out of the test gas. This color is compared with a standard showing the color of reaction for various concentrations of nickel.
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