| 摘要 |
A chemical measuring system of the titration type comprises an elongated, hollow conduit, the walls of which are formed of a porous membrane. The conduit is suspended in a body of titrant. In operation a sample fluid is passed through the conduit. Titrant permeates the walls of the conduit and reacts with the sample. An end point is observed by an observable change at some position along the conduit, that position being proportional to the concentration of the sample.
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