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Studies on the Determinations of Dissolved Oxygen in Beverages  

Lee, Tal-Soo (Division of Natural Food Additives, Korea Food and Drug Administration)
Lee, Young-Ja (Division of Natural Food Additives, Korea Food and Drug Administration)
Kwon, Yong-Kwan (Division of Natural Food Additives, Korea Food and Drug Administration)
Park, Jae-Seok (Division of Natural Food Additives, Korea Food and Drug Administration)
Hwang, Jung-Yun (Division of Natural Food Additives, Korea Food and Drug Administration)
Lee, Ju-Yeun (Division of Natural Food Additives, Korea Food and Drug Administration)
Song, Jee-Won (Division of Natural Food Additives, Korea Food and Drug Administration)
Chung, Bo-Yong (Division of Natural Food Additives, Korea Food and Drug Administration)
Lee, Chul-Won (Division of Natural Food Additives, Korea Food and Drug Administration)
Publication Information
Korean Journal of Food Science and Technology / v.34, no.3, 2002 , pp. 361-364 More about this Journal
Abstract
This study was performed to establish a simple and accurate method for the determination of oxygen that is a processing aid in various beverage. The quantitative determination of dissolved oxygen (DO) contents in 30 cases of samples were performed by traditional titration method and polarography. As a result of the study, the analysis of DO contents in fruit-extract beverages containing oxygen by titration method was time consuming and large sample volumes were needed. Besides, serious interferences with compounds such as hydroxylamine and nitric oxide were observed, leading to false response. Although the polarography is easily affected by $H_2S$, proteins, and various organic compounds, it is a simple and practical method that provides inexpensive and relatively rapid analysis. The polarography is best suited to the routine determination of DO in a large number of samples and it is expected that the polarography can directly be applied to the quality control of the beverages containing added oxygen. The analysis results of DO contents in various fruit-extract beverages with oxygen and without oxygen were as follows: 23.10 ppm to 32.60 ppm for various frutis extract beverages with oxygen, 0.70 pp to 2.54 ppm for mixed beverages without oxygen, 7.63 ppm to 8.28 ppm for drinking water.
Keywords
processed agent; dissolved oxygen; titration method; polarography; hydroxylamine; nitric oxide;
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