Application of A. C. Bridge for High Impedance Samples

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  • 精密交流ブリッジの試作とその応用
  • セイミツ コウリュウ ブリッジ ノ シサク ト ソノ オウヨウ

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Abstract

An a. c. bridge for high impedance samples is constructed, and measurements ofthee lectrical conductivity and the dielectric constant are made on the specimens of limestones at the frequency of 30, 100, 300, 1000, 3000c. p: s., respectively.<BR>The electrical conductivity of the thermoluminescent limestone increases with the frequency more rapidly, in the range of 10-11-10-9Ω-1·cm-1, than that of the nonthermoluminescent limestone, while the dielectric constant doesn't depend particularly on the frequency.<BR>The conductometric titration is also made on the dilute solution of potassium ethyl xanthate using silver nitrate solution as a titrant.It is possible to quantify the potassium ethyl xanthate in the concentration of 5×10-6 mol/l.

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