| 摘要 |
A detector is adapted to detect the kinds and concentrations of impurity metals in molten solder or changes in the tin-lead composition of the solder by measuring the dissolution rate of a metallic film. The detector comprises a light-transmissive rod, the bottom cross-sectional area of which is covered by a metallic film. The top cross-sectional area of the rod is connected to an optical measurement means through an optical fiber cable and the time required to dissolve the metallic film in the sample molten solder is measured.
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