Brillouin Spectroscopy as a Suitable Technique for the Determination of the Eutectic Composition in Mixtures of Choline Chloride and Water

2020 ◽  
Vol 124 (19) ◽  
pp. 4002-4009 ◽  
Author(s):  
Huan Zhang ◽  
M. Luisa Ferrer ◽  
María J. Roldán-Ruiz ◽  
Rafael J. Jiménez-Riobóo ◽  
María C. Gutiérrez ◽  
...  
Keyword(s):  
Eutectic Composition ◽  
Choline Chloride ◽  
Brillouin Spectroscopy ◽  
Suitable Technique

scholarly journals Ekstraksi Polifenol Total dari Daun Kadamba (Mitragyna speciosa Korth) Menggunakan Metode Choline Chloride-Sorbitol based Microwave Assisted Extraction

2019 ◽  
Vol 10 ◽  
pp. 131-134
Author(s):  
Ramila Hidayati ◽  
Dewi Rahmawati ◽  
Islamudin Ahmad
Keyword(s):  
Choline Chloride ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Green Solvent ◽  
Microwave Assisted ◽  
Extract Solution ◽  
Mitragyna Speciosa ◽  
Assisted Extraction ◽  
Total Extraction

This research was conducted to determine the influence of the use of the choline chloride-sorbitol based microwave assisted extraction (MAE) method against the total extraction of polyphenols from the leaf Kadamba (Mitragyna speciosa Korth). Simplisia extracted using solvent (green solvent) choline chloride-sorbitol with a ratio of 1:1; 1:2 and 1:3 g/g with sample and solvent ratio of 1:10 g/mL, microwave strength is 50% watt and performed for 10 minutes, the extract solution has been obtained and then done determination of total levels of polyphenols by using folin ciocalteu reagents and further measured its absorption with the UV-VIS spectrophotometer device at a wavelength of 770 nm. Based on the results of the study, obtained the levels of polyphenols from each comparison of solvent used against the sample of 334 mg of GAE/g samples (1:1 g/g solvent); 372 mg GAE/g samples (1:2 g/g solvents) and 299 mg of GAE/g samples (1:3 g/g solvents). Based on the results of the study can be concluded that the method of choline chloride-sorbitol based microwave assisted extraction (MAE) can be used to extract the polyphenols from Kadamba leaves easily, quickly and efficiently.

scholarly journals Determination of Selenium and Arsenic Ions in Edible Mushroom Samples by Novel Chloride–Oxalic Acid Deep Eutectic Solvent Extraction Using Graphite Furnace-Atomic Absorption Spectrometry

2018 ◽  
Vol 101 (2) ◽  
pp. 593-600 ◽  
Author(s):  
Rizwan Ali Zounr ◽  
Mustafa Tuzen ◽  
Muhammad Yar Khuhawar
Keyword(s):  
Oxalic Acid ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Absorption Spectrometry ◽  
Edible Mushroom ◽  
Graphite Furnace Atomic Absorption

Abstract In present study, we proposed the application of a deep eutectic solvent (DES) made up of choline chloride (ChCl) and oxalic acid (Ox) for the dissolution of different edible mushroom samples for the determination of selenium (Se) and arsenic (As) ions. Therefore, an innovative, green, novel, and inexpensive method based on ChCl–Ox as the DES was developed for the determination of Se and As ions in mushroom species by graphite furnace-atomic absorption spectrometry. The important analytical parameters were also optimized. The LODs for Se and As ions were found to be 0.32 and 0.50 µg/L, respectively. The LOQs for Se and As ions were found to be 1.06 and 1.65 µg/L, respectively. The RSD was observed to be less than 5% for both analyte ions. The accuracy of the developed method was confirmed by analyzing mushroom powder Certified Reference Material CS-M-3 (Boletus edulis). The developed technique was effectively useful for the determination of Se and As ions in different species of mushroom samples from Turkey.

Validation of methods for determining pediatric midazolam using wet whole blood and volumetric absorptive microsampling

Bioanalysis ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 1737-1754 ◽  
Author(s):  
Paul Abu-Rabie ◽  
Bikalpa Neupane ◽  
Neil Spooner ◽  
James Rudge ◽  
Philip Denniff ◽  
...  
Keyword(s):  
Whole Blood ◽  
Pediatric Patients ◽  
Blood Analysis ◽  
Pharmacokinetic Parameters ◽  
Validation Data ◽  
Bioanalytical Method ◽  
Whole Blood Analysis ◽  
Suitable Technique ◽  
Volumetric Absorptive Microsampling

Aim: Collection and quantitative analysis in dry blood using volumetric absorptive microsampling (VAMS™) potentially offers significant advantages over conventional wet whole blood analysis. This manuscript explores their use for pediatric sampling and explores additional considerations for the validation of the bioanalytical method. Results: HPLC–MS/MS methods for the determination of midazolam and its major metabolite 1-OH midazolam in both whole wet blood, and dry blood collected on VAMS were developed, validated, and used to support an observational clinical study to compare pharmacokinetic parameters in pediatric patients. Conclusion: Validation data met internationally accepted guideline criteria. A strong correlation was observed in calculated concentrations between wet and dry test samples, indicating that VAMS is a suitable technique for use in pediatric clinical studies.

Determination of the whole set of elastic constants of a polymeric Langmuir-Blodgett film by Brillouin spectroscopy

1989 ◽  
Vol 40 (5) ◽  
pp. 3323-3328 ◽  
Author(s):  
Fabrizio Nizzoli ◽  
Burkard Hillebrands ◽  
Sukmock Lee ◽  
George I. Stegeman ◽  
Gisela Duda ◽  
...  
Keyword(s):  
Elastic Constants ◽  
Brillouin Spectroscopy ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Film
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