Results 21 to 30 of about 21,988 (160)
Quality control of test iodine in urine by spectrophotometry UV–Vis [PDF]
AIP Conference Proceedings, 2017 A quality control of iodine test in with UV-Vis spectrophotometry has been done. The purpose of this research is to find out whether the test results of samples conducted by Clinical Office of Research and Development Of GAKI (BP2GAKI) laboratory are still controlled, feasible and reliable, and still consistent over time, as indicated by the control ...
Thorikul Huda +3 more
openaire +1 more source
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
doaj +1 more source
Correlation between UV-VIS spectra and the structure of Cu(II) complexes with hydrogenated dextran in alkaline solutions [PDF]
Hemijska Industrija, 2005 UV-VIS spectrophotometric investigations of Cu(II) complexes with hydroge-nated dextran showed that the complexation of Cu(II)-ions began at pH > 7. The formation of Cu(II) complexes with dextran monomer units was observed at pH 7-12.
Nikolić Goran S. +4 more
doaj +1 more source
Karakterisasi Senyawa Minyak Atsiri Ekstrak Etil Asetat Bawang Putih (allium sativum l.)
Indonesian Journal of Pharmaceutical Education, 2021 Garlic (Allium sativum L.) is one of tuber vegetable crops that is widely grown in various countries in the word and is often used as food spices and medicines. The purpose of this study was to characterize the volatile oil compound ethyl acetate extract
Muhammad Taupik +3 more
doaj +1 more source
Validation of Methylene Blue Analysis Method in Wastewater Samples by Uv-Vis Spectrophotometry
Equilibrium Journal of Chemical Engineering, 2023 <p><strong>Abstract.</strong> Methylene blue (MB) is an extensively utilized cationic dye in the textile industry. MB is, however, a highly noxious substance that can have detrimental effects on both the environment and human health. MB can pollute waterways and cause the mortality of aquatic organisms in the environment.
Mentik Hulupi +4 more
openaire +2 more sources
Chemometrics-Assisted UV-Vis Spectrophotometry for Quality Control of Pharmaceuticals: A Review
Indonesian Journal of Chemistry, 2023 Spectroscopic method in the UV-Vis region is considered the most molecular spectrometric method for content determination of a single component. However, a lot of pharmaceutical dosage forms comprise two or more components which lead to peak overlapping.
Laela Hayu Nurani +6 more
doaj +1 more source
Borneo Journal of Pharmacy, 2019 Coffee (Coffea sp) is the second-largest beverage consumed by people around the world whose process comes from the processing and extraction of coffee beans. Coffee has a chemical compound, one of which is caffeine. Caffeine is a crystal-shaped compound.
Sri Hainil +2 more
doaj +1 more source
Determination of total flavonoids in three Sedum crude drugs by UV-Vis spectrophotometry
Pharmacognosy Magazine, 2010 A simple, rapid UV-Vis spectrophotometry method for the determination of total flavonoids in Sedum sarmentosum Bunge., S. lineare Thunb., and S. erythrostictum Migo. was developed, with a good linearity, precision, and stability. The detection wavelength was set at 500 nm, and an extraction solvent was optimized.
Chen, Yujie, Wang, Jing, Wan, Dingrong
openaire +3 more sources
Indonesian Journal of Chemical ResearchCaffeine, tannins, and total phenol are chemical components of tea leaves that are beneficial for the body. Caffeine is a psychoactive substance, tannin is anti-diarrhea, and phenol compounds are antioxidants that prevent free radicals.
Ravendha Dikatoru +2 more
doaj +1 more source
The concentration of NaCl soaking to decreasing cyanide levels in Gadung (Dioscorea hispida Dennst)
Jurnal Teknologi Laboratorium, 2019 Cyanide is one component contained in gadung tubers, and therefore, consuming gadung that contains more than 1 ppm of cyanide can cause nausea and intoxication.
Dian Kresnadipayana, Helmy Indra Waty
doaj +1 more source