Q: how the principle of spectrophotometric experiments? Explain plz thank you
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A: Internal standard is added blank as well as sample to determine the concentration of analyte.
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A: Given: A) To sketch the expected chromatogram.
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A: Hi, we are supposed to answer one question. To get the remaining questions solved please mention the…
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A: The solution is shown below
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A: 19. Option D. Ultra micro analysis
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A: Standard Deviation and Coefficient of variation can be formulated as :
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A: Explain the meaning of the following terms and phrases: 1.1 Precision of a set of results.…
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Q: Retention time is the time taken for the mobile phase to reach the detector. True False
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A: Welcome to bartleby ! Introdduction : We have to tell whether the statement is true or not .
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Q: UVVIS spectrophotometry
A: Correct: A
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A: Option 2 is correct.
It is never necessary to take more than one composite sample per field.
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- Retention time is the time taken for the mobile phase to reach the detector. True FalseOne disadvantage of thin layer chromatography is that... it cannot be used for quantitative measurements. O it consumes large volumes of solvents O it cannot analyze volatile samples it cannot be used to analyze many samples simultaneously it requires a large amount of sample for analysisWhat are the advantages of using the KBr in IR spectroscopic sample preparation? Please shortly write at your own words. (4-5 lines maximum ).
- One method for quantitative determination of the concentration of constituents in a sample analyzed by gas chromatography is the area normalization method. In this method, complete elution of all of the sample constituents is necessary. The area of each peak is then measured and corrected for differences in detector response to the different eluates. This correction is accomplished by dividing the area by an empirically determined correction factor. The concentration of the analyte is found from the ratio of its corrected area to the total corrected area of all peaks. For a chromatogram containing three peaks, the relative areas were found to be 16.4, 45.2, and 30.2 in the order of increasing retention time. Calculate the percentage of each compound if the relative detector responses were 0.60, 0.78, and 0.88, respectivelyBriefly describe how a phase-contrast microscope work and the kind of image that itproduces. Give a specific use for this type of microscope.One method for the quantitative determination of the concentration of constituents in a sample analyzed by gas chromatography is area normalization. Here, complete elution of all the sample constituents is necessary. The area of each peak is then measured and corrected for differences in detector response to the different eluates. This correction involves dividing the area by an empirically determined correction factor. The concentration of the analyte is found from the ratio of its corrected area to the total corrected area of all peaks. For a chromatogram containing three peaks, the relative areas were found to be 16.4, 45.2 and 30.2, in order of increasing retention time. Calculate the percentage of each compound if the relative detector responses were 0.60, 0.78 and 0.88, respectively.
- fill in the column thats empty by finding the standard deviation for each average absorbance, with work please.Justify chromatography is used to separate only color compounds.which of the following statements is incorrect? A. a conventional mass spectrometer does not use a spectrophotometric detectorB. a conventional mass spectrometer does not always require high purity samplesC. a mass spectrum shows no signals due to uncharged speciesD. a conventional mass spectrometer uses high energy UV radiation
- Why is it important to acquire a reference spectrum and subtract it from the sample’s spectrum? Why are quartz cuvettes better for UV-visible absorption spectroscopy than polystyrene cuvettes, especially at lower wavelengths (UV)? What would happen if you put too much of a compound in the cuvette during the spectral measurement? Why is it important to avoid any scratch on the cuvette? Could you use a compact fluorescent light (CFL) bulb to perform UV-visible absorption spectroscopy? Why/why not?Explain why an internal standard is required during sample preparation in quantitative analysis when using atomic spectroscopy?Instrumentation of IR spectroscopy? Please answer at your own words.