i) Find the differences between the AES and XPS in terms of principle and information obtained from the spectra.  ii) Why AFM is mostly utilized microscopic method for the determination of the thickness of the film?

Q: What would the effect of increasing sample pressure (while maintaining a fixed cell length) have on…

A: The Fourier transform infrared spectroscopy, commonly known as FTIR, is a spectroscopic technique in…

Q: A Raman spectrum of undoped GaAs at room temperature is performed with a 514.5 nm laser. The…

A: Given: Wavelength 1 = 507.1 nm = 507.1 X 10-9 m                                  (Since 1 nm = 10-9…

Q: 1 2 3 TEST TUBE 4 5 Blank Unknown solution Volume 0.52 M Fe₂(SO4)3 1.00 mL 2.00 mL 3.00 mL 4.00 mL…

A:

Q: The following calibration data were obtained by an atomic absorption spectrophotometric (AAS) method…

A: Calculation for the above questions given below.

Q: What are the interferences in AAS technique? Give examples and corrective measures

A: Atomic absorption spectrometry (AAS) is a technology that uses free gaseous atoms to absorb…

Q: Explain why it is easier to conduct multielement analysis using AES than it is using AAS

A: AES means atomic emission spectroscopy in which excited state atomic sample is used and that is…

Q: a forensic toxicologist, you have been given a task on determining amount of cadmium, mercury,…

A: The concept of flame and electro thermal atomic absorption spectroscopy is given as follows-…

Q: What technique – FTIR or Raman spectroscopy would you use to study – emulsion polymerization?…

A: Emulsion polymerization has wide range of applications in industries as well as academics. It is…

Q: Fluorometry is more selective and more sensitive than absorption spectrometry.Tell what is meant by…

A: Sensitivity: It is relatively easy to detect lower level of light from fluorescent emissions than…

Q: Indicate which other analytical techniques TGA can be coupled with and what would be the advantages?

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Q: what would be the shift and coupling constants of these peaks measured by a 300MHz…

A: Chemical Shift (δ) : It is the position of the peak with respect to reference (usually TMS).…

Q: Two solutions of the same UV-absorbing molecule were analyzed by UV-vis spectroscopy on the same…

A: Given the path length of the cell, b = 1 cm Since the two solutions, A and B have the same…

Q: In the analysis conducted with flame AAS, standard solutions of the X-type are analyzed individually…

A: The value of LOD and LOQ can be determined using respective formulas.

Q: What characteristic makes a photodiode array spectrophotometer suitable for measuring the spectrum…

A: Ans: 1- Characteristics The following characteristic makes a photodiode array spectrophotometer…

Q: How a UV-Vis spectrophotometer can be used in analyzing a colorless sample? Please answer in detail…

A: Absorbane can be Measured by Beer's Law. A=ebc A=Absorbane b=distance c= concentration

Q: What are the processes of concentrate samples analysis in Uv-visible spectroscopy? Please shortly…

A: UV-Visible spectroscopy is based on the absorption of uv or visible light by chemical compounds…

Q: Draw and label a schematic of an ICP-OES spectrophotometer. Briefly (point form is acceptable)…

A:

Q: Name the two gases used in NMR spectrometer. What are their functions in the equipment?

A: NMR spectrometry allows the molecular structure of a material to be analysed by observing and…

Q: Why are instrumental methods (e.g. UV Vis spectroscopy) considered as comparative methods?

A: Instrumental methods are techniques employing various scientific instruments for the analysis and…

Q: Mass spectrometry and UV/Vis absorbance spectroscopy can both be used as letectors for liquid…

A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: What are the units of the retention factor (Rf)? Briefly explain your conclusion.

A: The correct answer about Retention factor is given below

Q: What are the similarities between fluorescence detectors in HPLC and chemiluminescence detectors in…

A: Chromatography detectors are used to detect compounds that are eluted from the chromatography…

Q: (A) Draw a sketch of the expected chromatrogram (peaks, broadening, relative elution times, etc.)

A: Given: A) To sketch the expected chromatogram.

Q: Inductively coupled plasma-optical emission spectrometry (ICP-OES) was used for the determination of…

A: A standard solution of 2.15 ppm Cd2+ gave signals of count = 19,291 A standard solution of 5.76 ppm…

Q: What are the disadvantages of uses the Thick Layer stationary phase in Thin Layer Chromatography…

A: What are the disadvantages of uses the Thick Layer stationary phase in Thin Layer Chromatography…

Q: What are the disadvantages of uses the Thick layer stationary phase in Thin layer Chromatography…

A: Thin layer chromatograpy is one of the conventional technique for the separation of mixture of…

Q: What is the relationship between the excitation wavelength (λex) and emission wavelength (λem) in…

A: In the excitation spectrum, The emission monochromator is set to some wavelength where the sample is…

Q: The measured absorbance of a solution with a pathlength of 1.00 cm is 0.544. If the concentration is…

A: pathlength (l) =1.00 cm Absorbance (A) = 0.544 concentration(c) = 1.40 x 10 —3M

Q: What are the processes of concentrate samples analysis in Uv-visible spectroscopy? Please shortly…

A: The absorbance spectra of a compound in solution or as a solid are obtained by Uv-visible…

Q: 6 Why standard solutions are used in Atomic absorption Spectroscopy (AAS) whereas UV-Vis molecular…

A: Spectroscopy is based on the interaction between light and matter. Atomic absorption spectroscopy is…

Q: How do I calculate the standard deviation of background (baseline) on the UV-Vis absorbance…

A:

Q: why it makes sense to use an internal standard in IR spectrometry when its not used in Uv-Vis

A: Solutions- Internal standard method is used in Infra-red spectrophotometry.

Q: Why is it important to acquire a reference spectrum and subtract it from the sample’s spectrum?…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 2. In a study of the influence of experimental variables on detection limits in flame atomic…

A: Answer - Atomic absorption spectroscopy - Atomic absorption spectroscopy, or AAS, is a technique for…

Q: Standard Solution Data Measured with the SpectroVis: Standard Concentration Absorbance (mg/mL) 0…

A: The equation of best fit line for the graph of absorbance vs. concentration in order to find unknown…

Q: The following standard solutions were used to assess Mg in a river near Pengkalan Hulu. A graphite…

A: AAS is based on the principle of Lambert Beer's law which states that absorbance is directly…

Q: Which of the following is a reasonable estimate of the extinction coefficient for absorbance at 280…

A:

Q: Instrumental Analysis Class The experiment is OES: Cleaning Validation of removal of pharmaceutical…

A: In fluorescence spectroscopy it is common to use Photo Multiplying Tubes (PMT) as detectors due to…

Q: Band broadening in chromatography is .a O inversely proportional to the column efficiency .b O…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Peak or band broadening is more likely to occur in: gradient elution or isocratic elution?

A: Gradient elution and iscratic elution are two different types of liquid chromatography. Both…

Q: Why is the ionization of the analyte atoms in the flame an undesirable process in flame atomic…

A: A question based on flame ionization spectroscopy, which is to be accomplished.

Q: What is the relationship between chemical shift in ppm and operating frequency?

A: The relationship between chemical shift in ppm and operating frequency has to be given below.

Q: A solution of potassium permanganate of unknown concentration was analyzed against a standard of…

A: The absorbance of the potassium per magnet solution depends on the concentration of the solution. If…

Q: (a) What is the main difference between a UV-Vis spectrophotometer and a spectrofluorometer? (b)…

A:

Q: While performing absorbance measurements of standard solutions, Taranpreet used - 8 ml of solution…

A:

Q: Seawater was spiked with phosphate to achieve a quantifiable range of phosphate concentrations by…

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: What are the parameters that can be used for analytes identification and quantification using Cyclic…

A: Cyclic voltammetry can be applied to determine many reaction mechanisms when electron ttransfer is…

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.