| 摘要 |
A method and apparatus for demonstrating photometric procedures and conducting colorimetric analysis. The apparatus provides a confined light path from a light source, and a test tube containing a known colored solution and a second tube containing the pure solvent to be used for an unknown concentration of the solute are placed in the light path. Transmission of the light through the tubes is measured, and then an unknown concentration of the solute is added to the second tube and the light transmission again measured and compared with the first measurement. The difference in light transmission can then be used by well known physical laws to determine the unknown concentration.
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