Ultra‐fast liquid chromatography method coupled with ultraviolet detection to quantify dimethylsulfoxide, dimethylformamide and dimethylacetamide in short half‐lives radiopharmaceuticals

2021 ◽  
Author(s):  
Julien Fouque ◽  
Timofei Rusu ◽  
Samuel Huguet ◽  
Emilie Da Costa Branquinho ◽  
Sandy Blondeel‐Gomes ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Chromatography Method ◽  
Ultraviolet Detection ◽  
Liquid Chromatography Method ◽  
Fast Liquid Chromatography

scholarly journals Chemical Fingerprinting of Valeriana Species: Simultaneous Determination of Valerenic Acids, Flavonoids, and Phenylpropanoids Using Liquid Chromatography with Ultraviolet Detection

2006 ◽  
Vol 89 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Andres Navarrete ◽  
Bharathi Avula ◽  
Young-Whan Choi ◽  
Ikhlas A Khan
Keyword(s):  
Liquid Chromatography ◽  
Phosphoric Acid ◽  
Chlorogenic Acid ◽  
Gradient Elution ◽  
Chromatography Method ◽  
Ultraviolet Detection ◽  
Chemical Fingerprinting ◽  
Liquid Chromatography Method ◽  
Valerenic Acids

Abstract The roots and rhizomes of various valeriana species are currently used as a sleeping aid or mild sedative. A liquid chromatography method has been developed that permits the analysis of chlorogenic acid, lignans, flavonoids, valerenic acids, and valpotrates in various valerian samples. The best results were obtained with a Phenomenex Luna C18(2) column using gradient elution with a mobile phase consisting of water and 0.05% phosphoric acid and 2100% acetonitrilemethanol (1 + 1) with 0.05% phosphoric acid. The flow rate was 0.8 mL/min and ultraviolet detection was at 207, 225, 254, 280, and 325 nm. Different valerian species and commercial products showed remarkable quantitative variations. Chlorogenic acid (0.21.2%), 3 lignans, linarin (0.0020.24%), and valepotriates were detected in all the valeriana species analyzed. Highest amounts of valerenic acids were detected in V. officinalis L., trace amounts in V. sitchensis, and none in the other species analyzed.

A stability‐indicating ultra‐fast liquid chromatography method for the assay of the main flavonoids of Achyrocline satureioides (Marcela) in porcine skin layers and nanoemulsions

2020 ◽  
Vol 31 (6) ◽  
pp. 905-914
Author(s):  
Lucélia Albarello Balestrin ◽  
Flávia Nathiely Silveira Fachel ◽  
Letícia Scherer Koester ◽  
Valquiria Linck Bassani ◽  
Helder Ferreira Teixeira
Keyword(s):  
Liquid Chromatography ◽  
Porcine Skin ◽  
Chromatography Method ◽  
Stability Indicating ◽  
Liquid Chromatography Method ◽  
Fast Liquid Chromatography ◽  
Achyrocline Satureioides
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