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1.what data must be available when HPLC method is passed on
2.why eluents should be degassed
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- Why is catalytic dewaxing not considered as a separation process? andHow do you weigh hydgroscopic samples? 2. How do you analyze a sample in “weight basis” or as received basis”?6. The following are disadvantages of using filter paper in gravimetry, which is not included? a. React with strong acids and strong bases b. Break under mild stress c. Ashless filter paper is used d. Prevent use of suction 7. Which of the following can not be used to minimize supersaturation and thus used to crystalline properties? а. Нeating b. Using dilute solutions c. Rapid addition of the precipitating agent d. Air control
- 1. What is drying to a constant weight? 2. Aside from sieving, what other methods are used to determine particle size. Give and describe briefly at least two methods.Choose the appropriate techniques for degassing the mobile phase of HPLC. I. Ultrasonic II. Boiling III. Sparging IV.Filtering A. I and II B. Il and III C. I and III D. III and IV1. The properties that must be possessed by the adsorption reagent in air sampling are…a. Reagents must be resistant to oxidationb. Reagents must be qualitativec. Reagents must be applicable to all gaseous analytesd. Reagents must be in large quantities
- 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 imagethe 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 explainWhich of the three methods, (Use of Separatory Funnel, Decantation or Use of Pasteur Pipette) do you believe is most suitable for transferring large volumes of liquid mixtures and why?
- FTIR-ATR is suitable for which of the following samples? a. liquid b. powder c. gas d. crystalWhat are the general characteristics of Gas Chromatography, Thin Layer Chromatography, Ion Exchange, HPLC, SEC and Affinity Chromatography? What elutes first? Additionally can you explain what exactly is stationary phase and mobile phase?What effect will the following have on plate height (H). Make sure to explain your full and complete reasoning. a. Increasing stationary phase thickness