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http://dx.doi.org/10.13103/JFHS.2021.36.4.342

Monitoring of Microbial Contamination and Caffeine Content of Cold Brew Coffee  

Kwon, Sung Hee (Division of Food Analysis, Incheon Metropolitan City Institute of Public Health and Environment)
Kim, Kyung-Seon (Division of Food Analysis, Incheon Metropolitan City Institute of Public Health and Environment)
Lee, Bo Min (Division of Food Analysis, Incheon Metropolitan City Institute of Public Health and Environment)
Han, Young Sun (Division of Food Analysis, Incheon Metropolitan City Institute of Public Health and Environment)
Heo, Myong-Je (Division of Food Analysis, Incheon Metropolitan City Institute of Public Health and Environment)
Kwon, Mun-Ju (Division of Food Analysis, Incheon Metropolitan City Institute of Public Health and Environment)
Om, Ae-Son (Department of Food and Nutrition, College of Human Ecology, Hanyang University)
Publication Information
Journal of Food Hygiene and Safety / v.36, no.4, 2021 , pp. 342-346 More about this Journal
Abstract
Cold brew coffee extracted from cold water for a long time has drawn public concern over hygiene. This study was carried out to investigate the microbiological contamination levels and caffeine contents in cold brew coffee. A total of 75 cold brew coffees were purchased from offline and online sources. As a result, the average number of bacteria in samples purchased online was 1.14 log CFU/mL (0-6.57 log CFU/mL), while bacteria were not detected in samples purchased offline. Therefore, stricter surveys are required to avoid the food contamination. However, Esherichia coli and nine types of foodborne pathogens were not detected in all samples. The average caffeine content of the samples was 1.6 mg/mL (384 mg/240 mL), so the caffeine almost reached to acceptable daily intake levels (400 mg for adults). However, ten products did not provide any precautions for consumer safety, so improvement of the system is needed. This monitoring data can contribute to the protection of consumer rights and improvement in the safety of cold brew coffee.
Keywords
Cold brew coffee; Monitoring; Microbial contamination; Caffeine content;
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1 Zhang, W.Y., A benefit-risk assessment of caffeine as an analgesic adjuvant. Drug Saf., 24, 1127-1142 (2001).   DOI
2 Erikson, G.C., Hager, L.B., Houseworth, C., Duggan, J., Petros, T., Beckwith, B.E., The effects of caffeine on memory for word lists. Physiol. Behav., 35, 47-51 (1985).   DOI
3 Choi, J.H., Park, J.Y., Lim, E.G., Choi, M.K., Kim, J.S., Choi, G.B., Jeong, S.G., Hahm, Y.S., An investigation of microbial contamination of side dishes sold at traditional market and super market in Ulsan. J. Food Hyg. Saf., 27, 87-95 (2012).   DOI
4 Hwang, S.H., Kim, K.S., Kang, H.J., Kim, M.J., Phenolic compound contents and antioxidative effects on cold brew coffee by extraction time. Kor. Pub. Health Res., 39, 21-29 (2013).   DOI
5 Lee, K.H., Kim, B.H., Taste change and preference analysis of dutch coffee by grinding coffee bean. J. Korea Acad. Ind. Coop. Soc., 11, 793-795 (2014).
6 Temple, J.L., Bernard, C., Lipshultz S.E., Czachor, J.D., Westphal, J.A., Mestre, M.A., The safety of ingested caffeine: a comprehensive review. Front. Psychaiatry, 8, 80 (2017).   DOI
7 Fuller, M., Rao, N.Z., The effect of time, roasting temperature, and grind size on caffeine and chlorogenic acid concentrations in cold brew coffee. Sci. Rep., 7, 17979 (2017).   DOI
8 Ministry of Food and Drug Safety, (2021, July 30). Korean Food code. Retrieved from https://www.foodsafetykorea.go.kr/foodcode/01_01.jsp
9 Cordoba, N., Pataquiva, L., Osorio, C., Moreno Moreno, F.L., Ruiz, R.Y., Effect of grinding, extraction time and type of coffee on the physicochemical and flavour characteristics of cold brew coffee. Sci. Rep., 9, 8440 (2019).   DOI
10 Kim, Y.T., Hong, G.W., Choi, J.H., Kang, D.H., 2010. Principles of coffee. first ed. Kwangmoonkag, Paju, Gyeong-gi, Korea, pp. 150-157.
11 Korea Consumer Agency, 2015. Dutch coffee safety survey. Korea Consumer Agency, Eumseong-gun, Korea.
12 Ministry of Food and Drug Safety, 2019. 2019 Detection method for foodborne pathogens investigation. Ministry of Food and Drug Safety, Cheongju, Korea, pp. 85
13 Hwang, S.H., Microorganism contaminants of dutch coffee and change according to the storage period. Korean J. Food Nutr., 28, 422-427 (2015).   DOI
14 Kim, H.J., Hwang, Y.I., Lee, S.C., Inhibitory effect of hydrogen peroxide on the growth of Escherichia coli. J. Basic Sci., 19, 113-117 (2004).
15 Brody, A.L., Lord, J.B., 2007. Developing New Food Products for a Changing Marketplace. second ed. CRC Press, Boca Raton, FL, USA, pp. 153-202.
16 Heaney, R.P., Effects of caffeine on bone and the calcium economy. Food Chem. Toxicol., 40, 1263-1270 (2002).   DOI
17 van Dam, R.M., Hu, F.B., Willett, W.C., Coffee, caffeine, and health. N. Engl. J. Med., 383, 369-378 (2020).   DOI
18 Smith, A., Effects of caffeine on human behavior. Food Chem. Toxicol., 40, 1243-1255 (2002).   DOI
19 Lieberman, H.R., 1992. Caffeine. In: Smith, A.P., Jones, D.M. (Eds.), Handbook of Human Performance, vol. 2. Academic Press, London, England, pp. 49-72.