Suggest a few improvements that can be made to enhance the separation or sensitivity of the existing method. Is the UV-visible detection a good method as far as the general properties of an ideal detector are concerned? What is the role of acetic acid in the mobile phase?
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Suggest a few improvements that can be made to enhance the separation or sensitivity of the existing method.
Is the UV-visible detection a good method as far as the general properties of an ideal detector are concerned?
What is the role of acetic acid in the mobile phase?
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- Mass spectrometry is an extremely versatile detection system for GC. However, interfacing an HPLC system to a mass spectrometer is a much more difficult task. Describe the major reasons why it is more difficult to combine HPLC with mass spectrometry than it is to combine GC with mass spectrometry.(a) What is the main difference between a UV-Vis spectrophotometer and a spectrofluorometer? (b) What is the main advantage of using a spectrofluorometer in quantitative analysis?Discuss the advantages and disadvantages of sequential versus simultaneous multichannel ICP spectrometers.
- Atomic Spectroscopy (a) In terms of spectral shape, how are atomic spectra different from molecular spectra? What is the source of this difference? (b) Describe the decision-making process for picking a line for atomic emission analysis of a given analyte. (c) For quality assurance, spike recovery is not sufficient to establish confidence in an analytical procedure. Explain this statement. What should be done instead to demonstrate satisfactory performance of an instrumental method (including elemental analysis). (d) Find a literature example of atomic spectroscopy used for elemental analysis. State the operating conditions with sufficient detail to reproduce the analysis; Please answer very soon will give rating surely All questions complete Answer needed Please help meWhich statement accurately contrasts flame atomization and graphite furnace atomization in Atomic Absorption Spectroscopy (AAS)? Flame atomization requires smaller sample volumes compared to graphite furnace atomization, which is more suitable for bulk analysis. Graphite furnace atomization achieves higher temperatures than flame atomization, often resulting in better sensitivity and lower detection limits. Flame atomization is typically used for solids and high-viscosity liquids, whereas graphite furnace atomization is preferred for volatile liquid samples. Graphite furnace atomization is a less precise method than flame atomization due to the inhomogeneity of the sample matrix within the furnace.Analytical Chemistry Briefly describe two advantages of capillary gas chromatography with massspectrometry detector (GC-MS) compared to capillary gas chromatography withflame ionization detector (GC-FID).
- What are the parameters that can be used for analytes identification and quantification using Cyclic Voltammetry, respectively?In the analysis conducted with flame AAS, standard solutions of the X-type are analyzed individually and the absorbance values obtained are plotted against concentration (ppm). It was seen that the slope of the calibration line obtained was 0.0925. The standard deviation of the absorbance values obtained by reading the blank 10 times under the same conditions was calculated as 0.00183 ppm. According to this; For the X-type calculate the following: a) LOD b) LOQ c) SensitivityWhat is the relationship between chemical shift in ppm and operating frequency?
- 5 What would the effect of increasing sample pressure (while maintaining a fixed cell length) have on an FTIR spectrum. By ”cell” I mean the chamber holding the gas.A Dubosq colorimeter consists of a cell of fixed path length and a cell of variable path length. By adjusting the length of the latter until the transmission through the two cells is the same. the concentration of the second solution can be inferred from that of the former. Suppose that a plantdye of concentration 25 μg dm-3 is added to the fixed cell. the length of which is 1.55 em. Then a solution of the same dye. but of unknown concentration. is added to the second cel l. It is found that the same t ransmittance is obtained when the length of the second cel l is adjusted to 1.18 em. What is the concentration of the second solution?6. In a flame spectrometric determination of sodium, lithium is used as an internal standard. Assume the spectrum of a standard solution that contains 2.00 ppm Na and 100 ppm Li shows two peaks with intensities of Ina= 4.22 and I= 9.24, respectively. An unknown sample solution that also contains 100 ppm Li gives two peaks with intensities of Ina = 6.16 and I= 8.24, respectively. Calculate the concentration of Na in the unknown sample in ppm. А. 3.08 рpm В. 6.16 рpm С. 4.22 рpm D. 3.27 ppm Е. 12.1 ppm
