Derivatiztion of sample is carried out to: a) Improve analyte peak shape analyte resolution b) Increase the detector response c) Improve d) All the above
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- the efficiency of a chromatographic column improves the measure thata.increases the height of the theoretical dishesb.decreases the number of theoretical platesc.platform height is reducedd.None of the above Which option is correct And explainwhat can be an analyte for using internal standard? sample: vegetable oil containing ethyl oleate, IS: Ethyl oleate. what should be analyte here (what mixture composions) to use for internal standard method and calibration?What are the mechanisms of samples separation work in Thin layer Chromatography? Please shortly answer at your own words. Answer should be to the point (specific 4-5 lines).
- FT-IR technique can be utilized for the analysis of unknown analytes by matching it with__________. Both choices are correct Commercial library/database Reference standardBrief discussion of column chromatographic separation (solvent polarity, elution ofcompounds etc.)the efficiency of a chromatographic column improves the measure thata.increases the height of the theoretical dishesb.decreases the number of theoretical platesc.platform height is reducedd.None of the above Please explain it Provide clear handwriting and clear image
- A 0.0200 gram blood sample was decomposed by a microwave digestion technique followed by dilution to 100.0 mL in a volumetric flask. Aliquots of the sample solution were treated with a lead complexing reagent and water as follows: Solution 1: 10.0 ml blood sample + 20.0 mL complexing agent + 30.0 mL H20. Solution 2: 10.0 ml blood sample + 20.0 mL complexing agent + 26.0 mL H20 + 4.00 mL of 78 ppb Pb2+ standard. The resulting solutions were analyzed by UV/Vis at 375 nm. Absorbance for solution 1 = 0.155 and for solution 2 = 0.216. Calculate the concentration of lead (ppb) in the original sample.A chemical species that causes a systematic error in an analysis by enhancing or attenuating the analytical signal or the background. A. Interferent B. Analyte C. Cation D. AnionRetention time is the time taken for the mobile phase to reach the detector. True False
- which of the folowing(s) is/are true ? 1 split ratio in GC is a ratio of sample passed to column to amount of mobile phashe 2 column resolution decreases with increasing column lenght 3 decreasing the tube diameter ,increases the resolutionIn order to execute paper chromatography, which of the following stages is required?I. Load the standard/s beside the sample spotsII. Allow the chromatogram to touch sides of beakerIII. Saturate the chamber with vapor of the mobile phaseIV. Place the spots at the same height as the solvent level
