Analysis of diclofenac in water samples using in situ derivatization-vortex-assisted liquid-liquid microextraction with gas chromatography-mass spectrometry

A novel micro-extraction technique for a rapid and sensitive analysis of diclofenac (DCF) in water samples has been developed. DCF was derivatized and extracted simultaneously using vortex-assisted liquid-liquid micro-extraction (VALLME) prior to gas chromatography with mass spectrometry detection. The effects of extraction solvent volume, extraction and derivatization time and ionic strength of the sample were studied using 23 factorial experimental design. The optimum extraction conditions were as follows: 200 µL of chloroform, 25 µL of N-methyl-N-trimethylsilyl-trifluoroacetamide (MSTFA) derivatization reagent, vortex extraction and derivatization time 5 min at 3000 rpm. The extraction recovery for different fortification levels was 98 %. Also, the proposed micro-extraction method exhibited results comparable with the solid phase extraction of real water samples. The proposed one-step VALLME and derivatization method is simpler and faster than the conventional extraction and derivatization methods used for the determination of DCF in real water samples

Stimulating Effect of Melatonin on the Phytochemical Content of Salvia officinalis L. Callus Cultures

Abstract The use of melatonin (MEL) on plants has recently become widespread. Melatonin (MEL) was used as elicitor in the leaf-derived sage (Salvia officinalis L.) callus culture, which allows production in a short time regardless of environmental factors. MEL was applied to the calli in various concentrations, and the effect on the amount and quality of phytochemicals was determined. MEL stimulated the production of the maximum quantity of sage calli and the synthesis of secondary metabolites when applied as an elicitor at a certain ratio (100 M). The callus induction rate decreased while the MEL concentration increased. Among the phytochemicals scanned by HPLC and GC-MS, especially the amount of rosmaniric acid was found to increase by 75% (100 µM). The amount of rosmarinic acid decreased gradually in the 200 µM and control groups. The color differences of the callus cultures were also considerable. The color, which was quite dark brown at 100 µM MEL, turned into a light color as the amount of rosmariniric acid decreased. In addition, phytochemicals such as α-thujone (27.56%), 1.8-cineole (5.9%), camphor (16.84%) analyzed in 100 µM MEL application have the highest rates compared to other applications. Phytochemicals present in the control group but not in the MEL treatments, and components present in the treatments but not in the control were detected (1.8-cineol, some aldehyde groups). Therefore, stimulating the production of pharmacologically valuable phytochemicals that can be obtained with a certain amount of MEL application in sage cell culture medium will provide an important commercial advantage

Analysis of diclofenac in water samples using in situ derivatization-vortex-assisted liquid-liquid microextraction with gas chromatography-mass spectrometry

A novel micro-extraction technique for a rapid and sensitive analysis of diclofenac (DCF) in water samples has been developed. DCF was derivatized and extracted simultaneously using vortex-assisted liquid-liquid micro-extraction (VALLME) prior to gas chromatography with mass spectrometry detection. The effects of extraction solvent volume, extraction and derivatization time and ionic strength of the sample were studied using 23 factorial experimental design. The optimum extraction conditions were as follows: 200 μL of chloroform, 25 μL of N-methyl-N-trimethylsilyl-trifluoroacetamide (MSTFA) derivatization reagent, vortex extraction and derivatization time 5 min at 3000 rpm. The extraction recovery for different fortification levels was 98 %. Also, the proposed micro-extraction method exhibited results comparable with the solid phase extraction of real water samples. The proposed one-step VALLME and derivatization method is simpler and faster than the conventional extraction and derivatization methods used for the determination of DCF in real water samples

Active Disease Is Associated with Dependency in Inflammatory Arthritis

WOS: 000411824102157