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3) Changing α is the most effective way of increasing resolution. This can be done by choosing a stationary phase that has a greater difference between k 1 ' and k 2 '. It can also be done in L.C. by using pH to invoke secondary equilibria (if applicable). The fundamental resolution equation is derived as follows:
Chromatographic peak resolution is given by = + where t R is the retention time and w b is the peak width at baseline. The bigger the time-difference and/or the smaller the bandwidths, the better the resolution of the compounds. Here compound 1 elutes before compound 2.
The Purnell equation is an equation used in analytical chemistry to calculate the resolution R s between two peaks in a chromatogram. [1] [2]= (′ + ′) where R s is the resolution between the two peaks
A mass chromatogram is a representation of mass spectrometry data as a chromatogram, where the x-axis represents time and the y-axis represents signal intensity. [1] The source data contains mass information; however, it is not graphically represented in a mass chromatogram in favor of visualizing signal intensity versus time.
The greater the separation factor value is over 1.0, the better the separation, until about 2.0 beyond which an HPLC method is probably not needed for separation. Resolution equations relate the three factors such that high efficiency and separation factors improve the resolution of component peaks in an HPLC separation.
A high value for resolution corresponding to good separation of peaks is similar to the convention used with chromatography separations, [13] although it is important to note that the definitions are not the same. [14] High resolution indicating better peak separation is also used in ion mobility spectrometry. [15]
Helps to select important compounds from a sample for further characterization using high-resolution mass spectrometry. Offers unique benefits such as super-hyphenation, minimum sample preparation requirements, detection of multi-modulating compounds, and distinguishing agonistic versus antagonistic effects.
Samsung has a QWXGA resolution 23" LCD monitor, the 2342BWX. 2048×1152 (2,359k) 2048 1152 2,359,296 16:9 UXGA: Ultra Extended Graphics Array A de facto high-resolution standard. This is the native resolution for many 20" LCD monitors, and was a recommended mode for some high-end 21" CRTs. 1600×1200 (1,920k) 1600 1200 1,920,000 4:3 24 bpp WUXGA