Results 11 to 20 of about 22,161 (255)
Walisongo Journal of Chemistry, 2022 Determination and characterization of the lycopene content of the n-hexane fraction from potato-leaved tomato (Solanum lycopersicum grandyfolium) using Fourier transform infrared (FTIR) spectrophotometry and UV-Vis spectrophotometry.
Arfiani Nur +4 more
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Scientific Reports, 2022 Stability studies are essential to be able to assign an expiration date to medications. Color variation is one of the organoleptic characteristics of actives substances or medications which can indicate the presence of contaminations, impurities or ...
Lara-Malenka Sakiroff +5 more
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Indonesian Journal of Medical Laboratory Science and Technology, 2019 Ascorbic acid mostly comes from vegetables and fruits, especially fresh fruits. Vitamin C is a vitamin that can be formed by several types of plants. One of them is papaya which has various contents including vitamin C that can increase endurance, help ...
Nosy Maria Riscahyani +2 more
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Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography [PDF]
Journal of Pure and Applied Chemistry Research, 2020 Caffeine is a xanthine alkaloid compound found in Robusta sp and Theobroma cacao L. The caffeine extract was obtained by evaporating CHCl3 using a rotary evaporator and determine its content using iodometry, UV-Vis spectrophotometry and High Performance ...
Yeanchon H. Dulanlebit +5 more
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Comparative Evaluation of UV/Vis Spectrophotometry and Ion Chromatography for Analyzing Low-Concentration Fluorine Compounds in Flue Gas [PDF]
대한환경공학회지As emission standards for fluorine compounds have become increasingly stringent in semiconductor and electronic component manufacturing facilities, and installation restrictions have been applied to facilities with large annual emissions, the importance ...
Seung-Jin Choi +5 more
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Photodegradation Study of Nystatin by UV-Vis Spectrophotometry and Chemometrics Modeling
Journal of AOAC INTERNATIONAL, 2014 Abstract Nystatin, one of the tetraene antifungal antibiotics, is very sensitive to light. Thus, when nystatin is exposed to natural daylight, it is photodegraded to products of lower biological activity. In this work, the photodegradation kinetics of nystatin was monitored by a UV-Vis spectrophotometry method.
Bahram, Hemmateenejad +3 more
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Jurnal Farmasi Sains dan Praktis, 2022 Borax is a dangerous material if it is contained in food so its use is prohibited. Borax contained in wet noodles is used as a preservative to keep the noodles supple and durable.
Rulyta Aulia Munandar +2 more
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Determination Of Sun Protection Factor By Uv-Vis Spectrophotometry
Health Care : Current Reviews, 2016 Background: Sunscreen products contain active ingredients that can absorb, reflect or scatter the sunlight, depending on their nature. We can evaluate the effectiveness of a sunscreen by determining the sun protection factor (SPF). This SPF should be specific for each phototype, so as to the protection against the damaging effects of UV rays may be the
Rafaelaa Nobre, Ana Paulaa Fonseca
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Kovalen: Jurnal Riset Kimia, 2020 This study aims to determine the content of secondary metabolites and the levels of total secondary metabolites in ethanol extract of Okra (Abelmoschus esculentus L. Moench) fruit with UV-Vis Spectrophotometry method.
Joni Tandi +3 more
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Determination of Ni(II) in metal alloys by spectrophotometry UV-Vis using dopasemiquinone
Química Nova, 2010 A spectrophotometric method was proposed for Ni(II) determination in alloys using a dopa-semiquinone (L-1) to form [Ni(II)(L1-)3]1-, ε = 9.3 x 10³ L mol-1 cm-1. The optimal conditions for the determination were: wavelength 590 nm, temperature 25 °C,
Wagner José Barreto +5 more
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