The role of diode array ultraviolet detection for the identification of synthetic cathinones

2017 ◽  
Vol 9 (10) ◽  
pp. 1512-1521 ◽  
Author(s):  
Walter F. Rowe ◽  
Ioan Marginean ◽  
Stephanie Carnes ◽  
Ira S. Lurie
Keyword(s):  
Synthetic Cathinones ◽  
Diode Array ◽  
Ultraviolet Detection

scholarly journals Determination of the bifenazate insecticide in apples and cucumbers by high performance liquid chromatography

2019 ◽  
Vol 55 (4) ◽  
pp. 422-428
Author(s):  
M. F. Zayats ◽  
S. M. Leschev
Keyword(s):  
Liquid Chromatography ◽  
High Performance ◽  
Diode Array ◽  
The European Union ◽  
Optimal Conditions ◽  
Plant Materials ◽  
Ultraviolet Detection ◽  
Maximum Residue Level ◽  
Distribution Constants

Based on the distribution constants of biphenazate, obtained experimentally and also calculated from literature data on the solubility of biphenazate in water and organic solvents, as well as experimental data on the extraction of biphenazate from plant matrices by various extractants, we selected the optimal conditions for extracting biphenazate from apples and cucumbers. The conditions for the purification of the extracts were also selected. Acetonitrile in the presence of ammonium sulfate and hexane was used for extraction of the pesticide. Purification of extracts of plant materials was carried out by partitioning between hexane and water-acetonitrile mixture. The samples obtained after this treatment were pure enough to determine the residual amounts of biphenazate in them at the maximum residue level determined in Belarus and the countries of the European Union, or lower using widespread liquid chromatography with diode-array (ultraviolet) detection.

scholarly journals Role of amino terminal substitutions in the pharmacological, rewarding and psychostimulant profiles of novel synthetic cathinones

2020 ◽  
Author(s):  
Leticia Duart Castells ◽  
Magdalena Muralter ◽  
Nuria Nadal Gratacos ◽  
Brigitte Puster ◽  
Xavier Berzosa ◽  
...  
Keyword(s):  
Synthetic Cathinones ◽  
Amino Terminal

scholarly journals Role of amino terminal substitutions in the pharmacological, rewarding and psychostimulant profiles of novel synthetic cathinones

2021 ◽  
Vol 186 ◽  
pp. 108475
Author(s):  
L. Duart-Castells ◽  
N. Nadal-Gratacós ◽  
M. Muralter ◽  
B. Puster ◽  
X. Berzosa ◽  
...  
Keyword(s):  
Synthetic Cathinones ◽  
Amino Terminal

scholarly journals The development of methods for the determination of residues of the insecticide pymetrozine in water, soil, cucumber and rape

2019 ◽  
pp. 79-87
Author(s):  
Mikhail F. Zayats ◽  
Sergey M. Leschev
Keyword(s):  
Experimental Data ◽  
Orthophosphoric Acid ◽  
Residue Level ◽  
Inorganic Salts ◽  
Diode Array ◽  
The European Union ◽  
Optimal Conditions ◽  
Ultraviolet Detection ◽  
Maximum Residue Level

Based on the literature data on the solubility of pymetrozine in water and organic solvents, as well as experimental data on the extraction of pymetrozine from water, soil and plant matrices, the optimal conditions for the extraction of pymetrozine from water; soil; cucumber; rape seeds, oil and green pods were selected. The conditions for cleaning extracts were selected as well. At the first stage, acetonitrile, a mixture of dichloromethane – isopropanol, or a mixture of dichloromethane – methanol in the presence or absence of inorganic salts were used for extraction of the pesticide. Pymetrozine was found to be a highly hydrophilic substance. For the purification of extracts of pymetrozine from plant matrices the extraction systems hexane – 0.02 mol/L aqueous solution of orthophosphoric acid, hexane or chloroform – aqueous solutions of ammonium sulfate were successfully used. The samples, obtained after this treatment, were pure enough to determine the residual amounts of pymetrozine in them at the maximum residue level (MRL), determined in Russia and the countries of the European Union, or lower using widespread liquid chromatography with diode-array (ultraviolet) detection.

scholarly journals C-/O-GLYCOSYL FLAVONES OF SILENE ITALICA

2019 ◽  
pp. 119-127
Author(s):  
Daniil Nikolayevich Olennikov ◽  
Nina Igorevna Kashchenko ◽  
Nadezhda Konstantinovna Chirikova
Keyword(s):  
High Performance ◽  
Diode Array ◽  
Ionization Mass ◽  
Mass Spectrometry Detection ◽  
Chemical Research ◽  
The Family ◽  
Array Detection ◽  
Genus Silene ◽  
First Time

Chemical research of Silene genus focused on the study of terpene compounds including ecdysteroids and triterpenoids, to the detriment of other classes of compounds. One of these poorly estimated group of substances are flavonoids, namely C-/O-glycosyl flavones, widely represented within the family Caryophyllaceae. Early studies revealed the presence of some C-glycosyl flavones (Zemtsova, Dzhumyrko, 1976; Darmogray, 1977), but a detailed study of the flavonoids was not conducted. Application of high performance chromatography with diode-array detection and electrospray ionization mass-spectrometry detection (HPLC-DAD-ESI-MS) allowed to found 14 flavonoids, which are C-, O- and C,O-glycosyl flavones in the aerial part of S. italica of Georgia origin. Ten components were discovered in S. italica for first time. The identified C-glycosides included monoglycosides as isoorientin, isovitexin, isoscoparin (chrysoeryol-6-C-glucoside) and diglycosides as carlinoside (luteolin-6-C-glucoside-8-C-arabinoside), schaftoside (apigenin-6-C-glucoside-8-C-arabinoside), isoschaftoside (luteolin-6-C-arabinoside-8-C-glucoside) and genkwanin-6-C-glucoside-8-C-arabinoside. Two O-glycosides, cosmosiin and cynaroside, and mixed C,O-glycosides as saponarin, isovitexin-2′′-O-arabinoside, isovitexin-6′′-O-arabinoside and O-hexosides od schaftosude and genkwanin-6-C-glucoside- 8-C-arabinoside were not previously identified in Silene genus. The known literature data (Mamadalieva et al., 2014) and the present data demonstrate the useful role of C-/O-glycosyl flavones in the systematics of the genus Silene.

The role of genetic factors in the development of suicidal behavior in individuals with dependence on synthetic cathinones

2020 ◽  
Vol 120 (10) ◽  
pp. 69
Author(s):  
A.E. Gareeva ◽  
U.G. Badretdinov ◽  
E.A. Akhmetova ◽  
K.O. Kinyasheva ◽  
T.R. Nasibullin ◽  
...  
Keyword(s):  
Suicidal Behavior ◽  
Genetic Factors ◽  
Synthetic Cathinones
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