In cation exchange chromatography,
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- When a mixture of various molecular sized dyes are run through a gel chromatography column, what is eluted in the Void Volume? A. Blue Dextran B. Flourescein C. Both D. NothingThe UV-Vis Spectroscopy technique is based on: A. Rotational excitation B. Nuclear excitation C. Electronic excitation D. Vibrational excitation E. None of the aboveA clinical technician finds that the activity of a sodium-24 sample is 1088 cpm. What will be the activity of the sample 90. h later if the half-life of sodium-24 is 15 h?
- Five identical biood samples were analyzed to deterttmine cholesterol level in a patient The feilwing values were ohtained 157, 154, 155, 152, 155. Calculate the standand enor of the mean (SEM) fo thee dataWhich of the following statements about AAS and AES is FALSE a)Sample used in AAS are usually in the form of aqueous solution b)In flame AAS, the flame is used for atomization as well as excitation purpose c)The graphite furnace is an example of non-flame atomizer d)In flame AES, no light source is required. What is the advantages of Axial torch configuration over Radial configuration in Inductive Couple Plasma-Optical Emission Spectrometer (ICP-OES) a)Increased radiation intensity – a longer path length b)Excellent tolerance to dissolve solids c)Can analyze S, P, and Halogens d)Excellent torch lifetimesCombustion of a fuel sample in a bomb calorimeter increases the temperature of the entire system by 5.10 °C if the calorimeter contains 1700 g of water, but only by 4.00 °C if the calorimeter contains 2200 g of water. What is the heat capacity of the dry bomb calorimeter assembly? Assume that the specific heat capacity of water is 4.18 J g–1 °C–1.
- True or false. Before sample is added to the ion exchange column for chromatography, the cation binding sites are unoccupied. Explain your reasoning in details.A doctor referred a patient to have a SPECT scan using a specific radiotracer. Thatradiotracer was not available in the lab, but another radiotracer with the same emittedphoton energy and half-life was available. Should the technician make the substitution?Explain.If Ca(NO3)2 solution is added to the saturated CaSO4 solution;Solubility product of CaSO4 (KÇ)II. Solubility of CaSO4III. The concentration of Ca + 2 ionWhich of these or which decreases at the same temperature? A) I only B) II only C) III only D) I and II E) II and III
- Which among the following statements is correct? Group of answer choices Both statements are incorrect Ion-exchange chromatography is dependent on the charge and size of the target component Both statements are correct Affinity chromatography is dependent on the affinity of the target component to the mobile phaseIn an electrochemical cell, Q = 0.00025 and K = 0.70. What can you conclude about Ecell and E°cell? Ecell is positive and E°cell is positive Ecell is negative and E°cell is positive Ecell is negative and E°cell is negative Ecell is positive and E°cell is negativeThe patient's water pitcher holds 950 milliliters (ml ).At the end of your shift, the water pitcher had 300 ml left .the patient said he drank the rest. How many milliliters did your patient drink?