A binary solid-liquid phase diagram experiment including determination of purity, enthalpy of fusion, and true melting point

1980 ◽  
Vol 57 (11) ◽  
pp. 831
Author(s):  
Edwin F. Meyer ◽  
Joseph A. Meyer
Keyword(s):  
Phase Diagram ◽  
Melting Point ◽  
Liquid Phase ◽  
Enthalpy Of Fusion ◽  
Solid Liquid

Determination of the Solid–Liquid Phase Diagram of the Binary System Propionic Acid/Water

2016 ◽  
Vol 61 (2) ◽  
pp. 806-812 ◽  
Author(s):  
Thouaïba Htira ◽  
Claudia Cogné ◽  
Emilie Gagnière ◽  
Denis Mangin
Keyword(s):  
Phase Diagram ◽  
Liquid Phase ◽  
Binary System ◽  
Propionic Acid ◽  
Acid Water ◽  
Solid Liquid

Determination of the Solid–Liquid Phase Diagram of the Binary System Acrylic Acid + Propionic Acid

2012 ◽  
Vol 57 (4) ◽  
pp. 1209-1212 ◽  
Author(s):  
Marie Le Page Mostefa ◽  
Hervé Muhr ◽  
Edouard Plasari ◽  
Michel Fauconet
Keyword(s):  
Phase Diagram ◽  
Liquid Phase ◽  
Binary System ◽  
Acrylic Acid ◽  
Propionic Acid ◽  
Solid Liquid

Multi-walled Carbon Nanotubes Reinforced into Hollow Fiber by Chitosan Sol-gel for Solid/Liquid Phase Microextraction of NSAIDs from Urine Prior to HPLC-DAD Analysis

2019 ◽  
Vol 20 (5) ◽  
pp. 390-400 ◽  
Author(s):  
Nabil N. AL-Hashimi ◽  
Amjad H. El-Sheikh ◽  
Rania F. Qawariq ◽  
Majed H. Shtaiwi ◽  
Rowan AlEjielat
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Sol Gel ◽  
Liquid Phase Microextraction ◽  
Extraction Device ◽  
Multi Walled Carbon Nanotubes ◽  
Solid Liquid ◽  
Walled Carbon Nanotubes

Background: The efficient analytical method for the analysis of nonsteroidal antiinflammatory drugs (NSAIDs) in a biological fluid is important for determining the toxicological aspects of such long-term used therapies. Methods: In the present work, multi-walled carbon nanotubes reinforced into a hollow fiber by chitosan sol-gel assisted-solid/ liquid phase microextraction (MWCNTs-HF-CA-SPME) method followed by the high-performance liquid chromatography-diode array detection (HPLC–DAD) was developed for the determination of three NSAIDs, ketoprofen, diclofenac, and ibuprofen in human urine samples. MWCNTs with various dimensions were characterized by various analytical techniques. The extraction device was prepared by immobilizing the MWCNTs in the pores of 2.5 cm microtube via chitosan sol-gel assisted technology while the lumen of the microtube was filled with few microliters of 1-octanol with two ends sealed. The extraction device was operated by direct immersion in the sample solution. Results: The main factors influencing the extraction efficiency of the selected NSAIDs have been examined. The method showed good linearity R2 ≥ 0.997 with RSDs from 1.1 to 12.3%. The limits of detection (LODs) were 2.633, 2.035 and 2.386 µg L-1, for ketoprofen, diclofenac, and ibuprofen, respectively. The developed method demonstrated a satisfactory result for the determination of selected drugs in patient urine samples and comparable results against reference methods. Conclusion: The method is simple, sensitive and can be considered as an alternative for clinical laboratory analysis of selected drugs.

The Pressure Dependence of the Phase Diagram t-Butanol/Water

1985 ◽  
Vol 40 (7) ◽  
pp. 693-698 ◽  
Author(s):  
M. Woznyj ◽  
H.-D. Lüdemann
Keyword(s):  
Phase Diagram ◽  
Phase Separation ◽  
Liquid Phase ◽  
Pressure Dependence ◽  
Liquid Phase Separation ◽  
Temperature Range ◽  
Solid Liquid ◽  
Rich Side ◽  
Liquid Liquid Phase Separation

The phase diagram t-butanol/water is studied in the temperature range between 200 and 450 K at pressures up to 200 MPa. No liquid/liquid phase separation is observed in this range. The solid/liquid phase diagram reveals the presence of a stable t-butanol/dihydrate at all pressures. At the t-butanol rich side of the diagram solid mixtures with compositions t-butanol/water ~ 5 :1 and ~ 6 : 1 are observed.

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