Results 31 to 40 of about 21,988 (160)

Determination of Heroin in Urine by Molecularly Imprinted Polymer-Based Solid-Phase Extraction and UV–Vis Spectrophotometry [PDF]

Kirkuk Journal of Medical Sciences
Background: Determination of heroin in urine is challenging because of matrix interference and heroin instability; therefore, this study aimed to develop a selective molecularly imprinted polymer-based solid-phase extraction method coupled with UV–Vis ...
Yehya Al-bayati, Nasreen Jber
doaj   +1 more source

The Use of Spectrophotometry UV-Vis for the Study of Porphyrins

, 2012
The porphyrins (Fig. 1) are an important class of naturally occurring macrocyclic compounds found in biological compounds that play a very important role in the metabolism of living organisms. They have a universal biological distribution and were involved in the oldest metabolic phenomena on earth.
openaire   +3 more sources

Identifikasi Deksametason dalam Jamu Pegel Linu dengan Metode Kromatografi Lapis Tipis dan Spektrofotometri UV-Vis

JIIS: Jurnal Ilmiah Ibnu Sina, 2016
Identification of dexamethasone has been done on herbal medicine and heal pains are getting warn the public of BPOM. There are 3 herbs and heal pains were getting warn the public of BPOM.
Tria Prayoga, Rahmat Widiyanto, Nur Mekasari   +2 more
doaj  

Validação de método analítico por espectrofotometria UV para sistema emulsionado lipídico contendo benznidazol

Química Nova, 2011
A validation study of an UV spectrophotometric method was conducted for quantitative analysis of benznidazol (BZN) in a lipid. The analytical determinations were performed at 315 nm at 25 ºC.
Letícia Streck, Kátia Solange Cardoso Rodrigues dos Santos, Matheus de Freitas Fernandes-Pedrosa, Arnóbio Antônio da Silva-Júnior, Anselmo Gomes de Oliveira   +4 more
doaj   +1 more source

Lavender hydrosol analysis using UV spectroscopy data and partial least squares regression

MethodsX
The aim of our work was to estimate the composition of hydrosol produced as a byproduct of lavender steam distillation using UV–Vis spectrophotometry in the 200–600 nm wavelength range through a machine learning algorithm.
Sára Preiner, Bálint Levente Tarcsay, Dóra Pethő, Norbert Miskolczi   +3 more
doaj   +1 more source

Total Metabolit Sekunder dan Uji Aktivitas Antioksidan Daun Juwet (Syzygium cumini L.) dengan Spektrofotometer Uv-Vis

Kovalen: Jurnal Riset Kimia, 2023
The aim of this research is to determine the total amount of secondary metabolites (alkaloids, flavonoids, saponins and tannins) contained in the ethanol juice of juwet leaves (Syzygium cumini L.) using the UV-Vis spectrophotometry method and to ...
Tien Wahyu Handayani Tien, Ni Kadek Evy Rasmiyanti, Joni Tandi, Magfirah   +3 more
doaj   +1 more source

Profile of Thin-Layer Chromatography and UV-Vis Spectrophotometry of Akar Kuning Stem Extract (Arcangelisia flava)

Borneo Journal of Pharmacy, 2018
This study aims to obtain the profile of Thin-Layer Chromatography (TLC) and Ultraviolet-Visible (UV-Vis) spectrophotometry from the ethanol extract of akar kuning stems (Arcangelisia flava) from Central Kalimantan.
Mohammad Rizki Fadhil Pratama, Suratno Suratno, Evi Mulyani   +2 more
doaj   +1 more source

Feasibility of Individual Carotenoid Quantification in Mixtures Using UV-Vis Spectrophotometry with Multivariate Curve Resolution Alternating Least Squares (MCR-ALS)

Journal of Spectroscopy, 2022
A fast and low-cost analytical method to determine the concentrations of carotenoids (β-carotene, lutein, and lycopene) from mixed standard solutions or from fruit extracts (kiwi fruits, tomato paste, pink grapefruit juice, kiwi-pineapple smoothie, and ...
Nawel Achir, Adrien Servent, Marvin Soto, Claudie Dhuique-Mayer   +3 more
doaj   +1 more source

ANALISA FLAVONOID DARI EKSTRAK ETANOL 96% KULIT BUAH OKRA MERAH (Abelmoschus esculentus L. Moench) SECARA KROMATOGRAFI LAPIS TIPIS DAN SPEKTROFOTOMETRI UV-VIS

JIIS: Jurnal Ilmiah Ibnu Sina, 2016
Has done research on flavonoids Analysis of Ethanol Extract 96% Fruit Leather Red Okra In Thin Layer Chromatography and Spectrophotometer UV-Vis. The purpose of this study was to analyze the content of the fruit skin red okra (Abelmoschus esculentus L ...
Nia Lisnawati, Indri Astuti Handayani, Ni’matul Fajrianti   +2 more
doaj  

Analysis of the Lead on Lip Tint Cosmetics on the Market Using UV-Vis Spectrophotometry Method

EduChemia, 2020
Analysis of the lead on lip tint cosmetics on the market has been successfully carried out. Before conducting the lead analysis, the method is first validated using the standard addition and measured by UV-Vis spectrophotometry.
Gatut Ari Wardani, Siti Laila Abiya, Fajar Setiawan   +2 more
doaj   +1 more source