Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Measurement of Electrical Conductivity for Detection of Abnormality of Raw Milk

원료유(原料乳)의 이상유무(異常有無)와 전기전도도(電氣傳導度)

  • Park, Ho-Gu (Busan.Kyeong-Nam Dairy Cooperative Association) ;
  • Bae, Tae-Jin (Dept. of Food Sci. & Technol., National Fisheries University of Busan) ;
  • Kim, Byeong-Sam (Dept. of Food Sci. & Technol., National Fisheries University of Busan) ;
  • Han, Bong-Ho (Dept. of Food Sci. & Technol., National Fisheries University of Busan)
  • 박호구 (부산.경남 우유 협동조합) ;
  • 배태진 (부산수산대학 식품공학과) ;
  • 김병삼 (부산수산대학 식품공학과) ;
  • 한봉호 (부산수산대학 식품공학과)
  • Received : 1983.05.10
  • Published : 1983.06.30
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Abstract

Electrical conductivity of raw milk obtained from milk cans transported from various dairy farms was discussed in relation to the contents of lactose, chloride and Koestler number to check the possibility of its application as a method for evaluation and detection of abnormality of raw milk. Correlation between the electrical conductivity and Koestler number was recognized with a coefficient of 0.76. The percentages of abnormal milk based on the Koestler number 3.5, chloride content 0.14% and the electrical conductivity $6.260({\mu}mho/cm){\times}10^3$ were 14.0%, 15.3% and 14.0%, respectively. In case of, the watered and salted milk, measurement of the specific gravity was necessary as an auxiliary process because of the decreasing electrical conductivity with increasing water content.

목장(牧場)으로 부터 납유(納乳)된 혼유상태(混乳狀態)의 수송관우유(輸送罐牛乳)의 이상유무판정(異常有無判定)을 위한 한 방법(方法)으로서 전기전도도측정법(電氣傳導度測定法)의 적용가능성(適用可能性) 여부(如否)를 유당함량(乳糖含量), 염소농도(鹽素濃度) 및 koestler number와 관련시켜 검토(檢討)하였다. 시료유(試料乳)의 전기전도도(電氣傳導度)와 koestler number와의 상관계수(相關係數)는 0.76이었다. 43개 시료유중(試料乳中) koestler number 3.5를 기준(基準)으로 한 이상유(異常乳)의 비율(比率)은 14.0%, 염소농도(鹽素濃度) 0.14%를 기준(基準)으로 하면 15.3%, 그리고 전기전도도(電氣傳導度) $6.260({\mu}mho/cm){\times}10^3$을 기준(基準)으로 한 비율(比率)은 14.0%였다. 가수(加水), 가염(加鹽)된 시료유(試料乳)의 이상유무판정(異常有無判定)에는 전기전도도측정(電氣傳導度測定)외에 보조적(補助的)으로 비중측정(比重測定)이 필요(必要)하였다.

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