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Toggle the table of contents. List of boiling and freezing information of solvents. ... –5.12 K b & K f [2] Bromobenzene: 1.49 156.0 6.26
In gas chromatography, the Kovats retention index (shorter Kovats index, retention index; plural retention indices) is used to convert retention times into system-independent constants. The index is named after the Hungarian-born Swiss chemist Ervin Kováts , who outlined the concept in the 1950s while performing research into the composition ...
CFC-113 is one of the three most popular CFCs, along with CFC-11 and CFC-12. [17] CFC-113 in laboratory analytics has been replaced by other solvents. [18] Reduction of CFC-113 with zinc gives chlorotrifluoroethylene: [5] CFCl 2 −CClF 2 + Zn → CClF=CF 2 + ZnCl 2
Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture. [ 1 ]
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
Toggle the table of contents. Resolution (chromatography) 1 language. ... where t R is the retention time and w b is the peak width at baseline. The bigger the time ...
Figure 5 compares the results when the general conditions of the GC-MS method were followed against the GC-VUV method run with Class 2 residual solvents. Tetralin eluted at approximately 35 minutes using the GC-MS method conditions, whereas the analyte had a retention time of less than 7 minutes when the GC-VUV method was applied. The co ...
The distribution constant (or partition ratio) (K D) is the equilibrium constant for the distribution of an analyte in two immiscible solvents. [1] [2] [3]In chromatography, for a particular solvent, it is equal to the ratio of its molar concentration in the stationary phase to its molar concentration in the mobile phase, also approximating the ratio of the solubility of the solvent in each phase.