Boiling point solvents

Solvent Boiling point, °c Solvent strength parameter ... 

Solvent Boiling point, °C Solvent strength parameter Viscosity, mN s m (20°C) Refractive index (20°C) UV cutoff, nm... 

Organic solvent Boiling point, °C AEyl alcohol Component, wt % Water Solvent... 

The retention gap techniques, essential for the analysis of very volatile components, are often replaced by concurrent eluent evaporation techniques, due to their simplicity and the possibility of transfering very large amount of solvent. In this case, the solvents are introduced into an uncoated inlet at temperatures at or above the solvent boiling point. 

Diacetone alcohol has been recently claimed as a solvent for polyimide preparation. According to the patent,107 ODA was dissolved in the solvent and then PMDA added to the solution. The patent claims good storage stability and easy removal of the solvent (boiling point 166°C). 

Solvents Boiling Point rO Density (kg/m ) Solubility in Water (kg/100 kg) Dielectric Constant... 

Solvent Boiling Point CO Viscosity (CP) Refractive Index UV Cut-off (nm) Dielectric Constant Dipole Moment (D) Surface Tension (dyne/cm)... 

Solvent Boiling point Microwave exposure Multimode Monomode Monomode... 

The maximum feasible operating temperature must be a sensible margin below the solvent boiling point, to enable insoluble contaminants to be removed from a pre-dissolved solution of the Crude API, see section 1.1.4. 

Organic solvent Boiling point, T CF) Freezing point. °C CF) Viscosity, cgs, 25T (77°F) Dielectric constant, 25T (77T)... 

SPIN-COATING Polymer composition Molecular weight Solvent boiling point Solvent vapor pressure Solution viscosity Solution concentration Spinning speed Acceleration Temperature Humidity Filtration... 

Solvent Solvent boiling point (°C) Density (g/mL) Heat of vaporization (kcal/g)... 

Solvent Boiling point ( C) Vapor pressure (mm Hg) Heat of vaporization (cal/g at boiling point)... 

Table 6.1 Solvent boiling points (bp) at ambient temperature under normal thermal heating and under microwave conditions43,91...

Solvent Boiling point (°Q (760 mmHg) Melting point (°C) Molecular weight (g)... 

Pressurized MAE in closed vessels This technique employs a microwave-transparent vessel for the extraction and a solvent with a high dielectric constant (electrical permittivity). Such solvents absorb microwave radiation and can thus be heated to a temperature exceeding solvent boiling points under standard conditions. Boiling does not occur, however, because the vessel is pressurized. This mode of operation is very similar to ASE—the elevated pressure and temperature facilitate extraction of the analyte from the sample. 

The elevated pressure and temperature used in ASE affects the solvent, the sample, and their interactions. The solvent boiling point is increased under high pressure, so the extraction can be conducted at higher temperatures. The high pressure also allows the solvent to penetrate deeper into the sample matrix, thus facilitating the extraction of analytes trapped in matrix pores. At elevated temperatures, analyte solubility increases and the mass transfer is faster. The high temperature also weakens the solute matrix bond due to... 

On-column injection Diluted samples 300-0.01 ppm (FID) per component optimum method for producing highly accurate results not suitable for very dirty samples (samples containing more than 0.1% of involatile by-products) requires cooling below solvent boiling point. 

Split injection relatively unimportant column temperatures below the solvent boiling point promote the recondensation effect, causing more sample material to enter the column than expected from the present split ratio. 

Splitless injection reconcentration of the bands broadened in time requires either lowering of the column temperature at least 60-90°C below the elution temperature of the solutes of interest (cold trapping) or keeping of the column at least 20-25 °C below the solvent boiling point to create solvent effects. 

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