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  • analytical chemistry - Difference between the terms “analyte” and . . .
    The ionized analyte ions formed in the interface between the HPLC and the mass spectrometer cannot survive collision with air molecules in the analyzer … and on p 151: Gas chromatography A separation technique in which the volatile analyte is swept by a carrier gas down a column packed with packing coated with an absorbing liquid
  • analytical chemistry - Does aliquot matter for final concentration . . .
    grams analyte ml × 40 ml = grams analyte extracted Now, in order to determine the original concentration of whatever solution you extracted from (assuming 100% extraction efficiency $^1$ ), you take grams analyte and divide by volume of original solution before the 40 ml extraction solution was mixed with it (also assuming a 2 phase
  • How and when do redox indicators work? - Chemistry Stack Exchange
    Both analyte and indicator are kept at the same potential As the standard reduction potential of ferroin is much higher than of iodine, near all iodide is oxidized when ferroin starts to be oxidized (except temporary effects out of equilibrium)
  • Calculate the titer of a solution - Chemistry Stack Exchange
    1 mL (Given NaOH conc X) = Y (weight) of analyte In your case, it will be, 1 mL (Given NaOH conc X) = mg of KHP It is a quick way of analyzing solutions Once an analytical chemist determines the titer of a titrant, all he she need to know is the burette volume, and we directly get the weight of the analyte in one step I will give you hints:
  • Finding unknown concentration using HPLC standard curve
    HPLC sample peak areas are usually compared with standard and end standard peak areas to give a percent of unknown analyte concentration to Standard concentration You then work back through your dilutions to get, in this case, ug ml of analyte in the original sample preparation flask Next you multiply by ml of that flask to get ug of analyte
  • analytical chemistry - What signal is measured at the detector in . . .
    You aspirate a blank (no analyte solution) into the flame- this sets the 100% transmission or absorbance = 0 at the chosen wavelength Ignore the reference beam; it is for ensuring that the lamp is stable We are only interested in the beam passing through the flame Next, you would aspirate your analyte solution into the flame
  • What explains the stark white colour of my iodometric titration analyte . . .
    This analyte solution was at first brown, but when titrated it turned a pale coffee colour When starch was added just before the end point, it turned a dark grey-brown colour, as expected - the iodine forming a complex with starch
  • What is the burette solution called in a titration, when its . . .
    Generally in titration, the unknown solution is in the conical flask, called the analyte; the standard solution is in the burette, called the titrant How do the terminologies change when one swaps the contents in the burette and the conical flask? Is the solution in the burette always called the titrant?
  • Retention time and dead time - Chemistry Stack Exchange
    $\begingroup$ "The dead time tM can be also interpreted as part of the retention time tR(A) for the analyte A, which the analyte spends in the mobile phase moving through the column (That is the reason for the subscrpt "M" meaning mobile) " I have come across statements with this very same meaning in my class but not reasoning





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