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Title: 02. Qualitative and quantitative determination of caffeine by comparing its amount in variety of black and green tea leaves marketed in Quetta city
Authors: Samiullah, Farida Behlil, Farrukh Bashir , Rukhsana Qasim, Musarat Fazal, Komal Titus, Muzaffar Khan
Journal: Pure and Applied Biology (PAB)
Publisher: Bolan Society for Pure and Applied Biology
Country: Pakistan
Year: 2021
Volume: 4
Issue: 1
Language: en
Six varieties of tea produced by various industries, consumed mostly, were investigated for the quality and quantity of caffeine by Ultra Violet-Spectrophotometer (UV-S). The objective of study was to know that whether the caffeine in boozed tea of green and black leaves are low or high. Further they were correlated for their quantitative analysis. Extraction provided colorless needles of caffeine characterized by IR Spectroscopy. The obtained results of UV-S provided the samples named as A, B, C and a, b, c caffeine concentrations indicated the secure range set by food and drug administration (FDA) except for the black sample C which carried greater level of caffeine.
Keywords: Caffeine; tea leaves; UV-spectrophotometer
http://dx.doi.org/10.19045/bspab.2015.41002
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