Determination of Lactic Acid and Acetic Acid in Cow Milk by Capillary Electrophoresis
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- Sano Yukiko
- Fukuoka City Institute for Hygiene and Environment
Bibliographic Information
- Other Title
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- キャピラリー電気泳動による牛乳中の乳酸及び酢酸の同時定量
- キャピラリー デンキ エイドウ ニ ヨル ギュウニュウ チュウ ノ ニュウサン オヨビ サクサン ノ ドウジ テイリョウ
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Abstract
A simple and rapid method by capillary electrophoresis (CE) was developed for the simultaneous determination of lactic acid and acetic acid in milk. The milk was diluted with water and deproteinized by an ultrafiltration filter (5,000 Da cut-off). Filtrate was analyzed by CE. The detection limits and the lenearity were 10mg/L, 10 〜 1,000mg/L of lactic acid and 5mg/L, 5 〜 1,000mg/L of acetic acid. Mean recoveries of lactic acid and acetic acid added to milk samples were 96.3% and 98.1%, and relative standard deviation of repeatability (RSD) was within 1.51% and 1.94% at level of 1mg/g. Total concentration of lactic acid and acetic acid was correlated with acidity in milk. (r=0.9916) The determination of lactic acid and acetic acid by this method is a useful way to judge lost freshness of milk easily and rapidly.
Journal
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- Japanese Journal of Food Chemistry and Safety
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Japanese Journal of Food Chemistry and Safety 8 (3), 144-148, 2002
Japanese Society of Food Chemistry
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Details 詳細情報について
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- CRID
- 1390282680171835008
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- NII Article ID
- 110007367230
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- NII Book ID
- AA11666400
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- ISSN
- 21896445
- 13412094
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- NDL BIB ID
- 6062799
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed