we can optimize peak separation by optimizing the HPLC conditions for standard solutions.
Single point threshold is show only peak maxima spectra whenever peak purity index is shows the front, tail and peak maxima spectra. for pure peak we have to consider three point peak purity which shows that your purity angle should be less than purity threshold which is clearly shows that your peak is specrally pure and homogeneous.
NP-HPLC is "Normal Phase" HPLC, wherein the solvents used are less polar than the substrate in the HPLC column (e.g. using hexane or dichloromethane with a silica HPLC column). RP-HPLC is "Reverse-Phase" HPLC, wherein the solvents used are more polar than the substrate in the HPLC column (e.g. using Water and Methanol with a octadecylsilane (ODS or C18) column).
HPLC is advanced
HPLC columns. (HPLC - High Performance Liquid Chromatography.)
we can optimize peak separation by optimizing the HPLC conditions for standard solutions.
to calculate signal to noise use this formulae peak hight *2/noise level
HPLC Column is one type of tube containing a stationary phase react with mobile phase to detect peak
RRF= (area or height peak X amount IS)/(area or height X amount pk) IS is the internal standard
Single point threshold is show only peak maxima spectra whenever peak purity index is shows the front, tail and peak maxima spectra. for pure peak we have to consider three point peak purity which shows that your purity angle should be less than purity threshold which is clearly shows that your peak is specrally pure and homogeneous.
A sine wave centered at zero will have a positive peak that is the same magnitude as the negative peak. This can be offset so the negative peak magnitude does not match the positive peak magnitude. For example a 1volt peak - neutral sine wave could be DC offset by 1 volt so the positive peak is at 2 volts and the negative peak is at 0.
Divide the retention time of the peak of ineterest (ex. 14.8 min.) by the retention time of the main peak (ex. 15.9 min.) 14.8/15.9 = 0.93 Therefore your RRT is 0.93 Remember, any peak with an RRT <1 elutes before the main peak, and any peak with an RRT >1 elutes after the main peak! What is RRT & RRF in hplc
NP-HPLC is "Normal Phase" HPLC, wherein the solvents used are less polar than the substrate in the HPLC column (e.g. using hexane or dichloromethane with a silica HPLC column). RP-HPLC is "Reverse-Phase" HPLC, wherein the solvents used are more polar than the substrate in the HPLC column (e.g. using Water and Methanol with a octadecylsilane (ODS or C18) column).
HPLC is advanced
Peak to Peak is the most positive peak to the negative peak value. Or find any peak value and multiply by 2.
why RT was shifting & how to RT calculation in HPLC
HPLC columns. (HPLC - High Performance Liquid Chromatography.)