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Mar 08, 2021 · The Chemical composition and spectral characteristics of Saudi propolis was studied by Liquid Chromatography Mass Spectrometry (LC–MS) and High-performance liquid chromatography–evaporative light scattering detector (HPLC–ELSD).The two main active compounds isolated from Saudi propolis via column chromatography and size exclusion
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Chromatogram of the standard solution corresponding to 100 µg/g of capsaicin and dihydrocapsaicin (conditions: column Betasil C 18 (150 × 4.6 mm × 3 μm), mobile phase: H 2 O/CH 3 CN, 50:50 v/v
Scientist holds a chemical sample bottle. Doctor hand in medical glove with clinical chemistry samples putting them to centrifuge. People hand holding a test tube vial sets for analysis in the gas liquid chromatograph.
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Samples were removed from the water bath and cooled to room temperature. The supernatant layer of each sample (5 mL) was filtered through 0.45 µm filter paper into a HPLC sample vial using a 5 mL disposable syringe (Millipore, Bedford, MA, USA). The vial was capped and stored at 5 °C in a refrigerator until analysis.
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Mar 21, 2022 · Quiz Flashcard. Chromatography general aspects. Questions and Answers. 1. which of the following is correct statement. A. Resolution is proportional to the square root of the number of theoretical plates in a column. B. Resolution is inverse proportional to the square root of the number of theoretical plates in a column.
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The Chemical Element Determination Laboratory of the Department of Chemical Laboratories provides outstanding services in the field of chemical analysis for various types of samples, with the latest advanced technology from major companies in the world, as well as an experienced working group with extensive experience in analysis and interpretation of readings and results.