Results 41 to 50 of about 5,392 (242)

Titrimetric methods for determining cationic surfactants

Журнал органічної та фармацевтичної хімії, 2022
Aim. To generalize and systematize information on titrimetric methods for determining quaternary ammonium compounds (QACs). Results and discussion.
Mykola Ye. Blazheyevskіy, Ewa J. Bulska, Andrii M. Tupys, Olena V. Koval’ska   +3 more
doaj   +1 more source

High Precision Titrimetry, Ion Chromatography and ICP-Optical Emission Spectrometry for the Estimation of Inhomogeneities in Aqueous Calibration Solutions for Metrological Purposes [PDF]

, 2018
.: The homogeneity of samples intended for metrological intercomparison studies must be granted without ambiguity. This holds equally true for aqueous solutions for which the determination of between-bottle variations requires measurement techniques with
Rezzonico, Sergio, Weber, Michael, Wüthrich, Jürg   +2 more
core  

A Comparative Analysis of Aspirin from Various Analgesic Formulations Using Titrimetry, Spectroscopic and Hyphenated Chromatographic Techniques

, 2018
The pharmaceutical activity of a drug formulation depends upon the chemical characteristics of drug molecules, thus any small variation in chemical properties and quantitative composition may lead to considerable variation in therapeutic effects. Aspirin,
Ochieng O Anthony, Moh’d Hs, Mataka A. Mataka, A. Juma, O. J. Odalo, Peter Oc   +5 more
semanticscholar   +1 more source

Quantitation Methods of Thermopsis Alkaloids: A Review

Регуляторные исследования и экспертиза лекарственных средств
INTRODUCTION. The major alkaloids of Thermopsis lanceolata R. Br. herb are thermopsine (N-methylcytisine), pachycarpine, and anagyrine, while the seeds predominantly contain cytisine used to treat tobacco addiction. Differing toxicity and pharmacological
N. P. Antonova, S. D. Kakhramanova, S. D. Alidzhanova, S. S. Prokhvatilova, E. P. Shefer   +4 more
doaj   +1 more source

Permanganometric determination of etamsylate in bulk drug and in tablets [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2009
One titrimetric and two spectrophotometric methods which are simple, selective, sensitive, accurate, precise and economical for the determination of etamsylate (ETM) in bulk drug and in tablets employing permanganate as the oxidimetric reagent are ...
K.B. Vinay, H.D. Revanasiddappa, O.Z. Devi, K. Basavaiah   +3 more
doaj  

Ion Analysis at the Highest Stage - The Metrological Approach by National Metrological Institutes [PDF]

, 2018
.: National Metrological Institutes (NMI's) from fifteen different countries participated in interlaboratory comparisons where concentrations of about 1 g kg−1 in solutions of aluminium, copper, iron, magnesium, chloride and phosphate were measured.
Felber, Helene, Weber, Michael
core  

Greenhouse Gas Emissions From a Large and Shallow Tropical African Lake: Contribution of Different Gases and Emission Pathways

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 10, October 2025.
Abstract Globally, nutrient enriched water bodies are major contributors to the aquatic greenhouse gases (GHG) efflux to atmosphere. However, few efforts have focused on assessing the contribution from coastal transitional ecosystems in Africa. To improve our knowledge of these systems, we investigated emissions in Lake Nokoué, a coastal lagoon in ...
S. K. d. L. Ague, K. Rinke, D. Mama, M. Koschorreck   +3 more
wiley   +1 more source

Impact of process variables on the micromeritic and physicochemical properties of spray-dried microparticles, part II: physicochemical characterisation of spray-dried materials [PDF]

, 2012
YesObjectives  In this work we investigated the residual organic solvent content and physicochemical properties of spray-dried chlorothiazide sodium (CTZNa) and potassium (CTZK) salts.
Al-Obaidi, Anne Marie Healy, Burnett, Corrigan, Council of Europe, Dobry, Gil, Gilani, Hancock, Hancock, Harjunen, Holubová, Kim, Krzysztof J. Paluch, Lidia Tajber, Maria I. Amaro, Mollica, Mollica, Nolan, NíÓgáin, Owen I. Corrigan, Paluch, Paluch, Paluch, Quesenberry, Seidell, Tajber, Tajber, Ulvi   +28 more
core   +1 more source

Safety of rapeseed protein–fibre concentrate as a novel food pursuant to Regulation (EU) 2015/2283

EFSA Journal, Volume 23, Issue 9, September 2025.
Abstract Following a request from the European Commission, the EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA) was asked to deliver an opinion on the safety of rapeseed protein‐fibre concentrate as a novel food (NF) pursuant to Regulation (EU) 2015/2283.
EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA), Dominique Turck, Torsten Bohn, Montaña Cámara, Jacqueline Castenmiller, Stefaan De Henauw, Ángeles Jos, Alexandre Maciuk, Inge Mangelsdorf, Breige McNulty, Androniki Naska, Kristina Pentieva, Alfonso Siani, Frank Thies, Margarita Aguilera‐Gómez, Thomas Frenzel, Harry J. McArdle, Peter Moldeus, Monika Neuhäuser‐Berthold, Morten Poulsen, Miguel Prieto Maradona, Josef Rudolf Schlatter, Henk van Loveren, Marcello Laganaro, Emanuela Turla, Anna‐Maria Pieger, Karen Ildico Hirsch‐Ernst   +27 more
wiley   +1 more source

Methods of quantitative determination of Sparteine hydroiodine

Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2015
Currently, there are many different methods of quantitative determination of alkaloid Sparteine amounts such as gravimetry, acidimetry, argentometry (including the use of ion-selective electrode), iodometry, extraction photometry, colorimetry ...
M. E. Blazheyevskyy, М. М. Kucher, V. V. Dyadchenko, I. O. Yurchenko   +3 more
doaj   +1 more source