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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 6
JKCSEZ 36(6)
December 20, 1992

Title	A Study on the Standard Cell and Its Enclosure 표준전지 및 표준전지 항온함 제작에 관한 연구
Author	Euijin Hwang, Hwashim Lee, Jinuk Lee, Hong Yol Kang 황의진, 이화심, 이진욱, 강홍열
Keywords
Abstract	기전력의 단위인 volt를 유지하기 위하여 사용되는 Weston 산성 포화전지를 만들어, 온도가 일정하도록 특별히 고안하여 제작한 enclosure에 넣어 성능을 평가하였다. 전지 제조에 사용되는 황산카드뮴은 진공 상태에서 재결정하였으며, 수은이 분산된 황산수은(I) 침전은 전기분해에 의해 제조하였으며, 카드뮴 아말감도 전기분해에 의하여 정확한 조성으로 제조할 수 있었다. 표준전지 항온함은 순환식 항온조를 이용하여 제작하였으며, 실내 온도가 심하게 변하는 경우에도 ±5 mK 이내로 표준전지의 온도를 안정시킬 수 있었다. 표준전지의 기전력을 5∼30℃의 온도 범위에서 측정하였으며 전지간의 기전력 표준편차는 약 1ppm이었다. Acid type saturated Weston cells that can be used as the standard of electromotive force unit were constructed and their characteristics in a specially designed enclosure were evaluated. Cadmium sulfate was purified by recrystallization under vaccum. Mercurous sulfate with dispersed mercury and the exact composition of cadmium amalgam were obtained by means of electrolysis. The enclosure was constructed using a commercial circulator. Temperature of the enclosure was only drifted in the range of ±5 mK in the case of extreme change of room temperature. The electromotive force of standard cells was measured over the temperature range of 5∼30℃. The standard deviation of the electromotive forces was about 1 ppm.
Page	857 - 863
Full Text	PDF

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