PC 카메라를 이용한 수돗물의 과망간산칼륨소비량 적정 자동화 (Automatic Titration for KMnO₄ Consumption Test of Tap Water Using Personal Computer Camera)

서지정보

· 발행기관 : 한국환경보건학회
· 수록지 정보 : 한국환경보건학회지 / 34권 / 1호 / 95 ~ 100페이지
· 저자명 : 이형춘

초록

Automatic titration using PC-camera having a color filter on its lens was executed in the KMnO₄ consumption test of tap water and distilled water for blank test. The very faint pink color of titration end point could be effectively detected by using the yellow cellophane paper as a color filter. The average hue value(Havg) of 192 pixels in the image of the sample solution being titrated was computed and followed up at regular time intervals during titration in order to detect the titration end point. The Havg decrease of 2 degrees from the average of first 10 Havgs was regarded as reaching the end point. The volume of 0.01N KMnO₄ consumed by a tap water sample was 0.728 0.022ml in manual titration and 0.735 0.013ml in automatic titration (p=0.580). The volume of 0.01N KMnO₄ consumed by a distilled water sample was 0.383 0.015ml in manual titration and 0.367 0.015ml in automatic titration (p=0.252). The high p-values for t-test suggested that there were good agreements between manual and automatic titration data and the automatic method proposed in this article was considered to effectively replace the manual titration.

영어초록

Automatic titration using PC-camera having a color filter on its lens was executed in the KMnO₄ consumption test of tap water and distilled water for blank test. The very faint pink color of titration end point could be effectively detected by using the yellow cellophane paper as a color filter. The average hue value(Havg) of 192 pixels in the image of the sample solution being titrated was computed and followed up at regular time intervals during titration in order to detect the titration end point. The Havg decrease of 2 degrees from the average of first 10 Havgs was regarded as reaching the end point. The volume of 0.01N KMnO₄ consumed by a tap water sample was 0.728 0.022ml in manual titration and 0.735 0.013ml in automatic titration (p=0.580). The volume of 0.01N KMnO₄ consumed by a distilled water sample was 0.383 0.015ml in manual titration and 0.367 0.015ml in automatic titration (p=0.252). The high p-values for t-test suggested that there were good agreements between manual and automatic titration data and the automatic method proposed in this article was considered to effectively replace the manual titration.

참고자료

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