(a)
Interpretation:
The difference between concentration-sensitive and mass-sensitive detector is to be stated and whether the thermal conductivity detector is mass or concentration sensitive.
Concept introduction:
Thermal conductivity can be defined as the ability of a material to conduct heat.
(b)
Interpretation:
Whether the atomic emission detector is mass or concentration sensitive.
.
Concept introduction:
Atomic emission occurs when an atom emits some specific wavelengths.
(c)
Interpretation:
Whether the thermionic detector is mass or concentration sensitive.
Concept introduction:
Thermionic emissions occur when electrons are excited from a heated source.
(d)
Interpretation:
Whether the electron captive detector is mass or concentration sensitive.
Concept introduction:
The electron capture is the process of making unstable atoms more stable.
(e)
Interpretation:
Whether the flame photometric detector is mass or concentration sensitive.
Concept introduction:
Flame photometry is utilized for inorganic chemical analysis. It can detect the concentration of some metals like lithium, sodium, calcium and more.
(f)
Interpretation:
Whether the flame ionization detector is mass or concentration sensitive.
Concept introduction:
Flame ionization detection is a device used to measure the analyte in a gas flow.
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Chapter 27 Solutions
Principles of Instrumental Analysis
- 6 why it makes sense to use an internal standard in IR spectrometry when its not used in Uv-Visarrow_forwardAssuming an integrated luminosity of 100 fb is collected at the ATLAS detector at the LHC, calculate the number of h ZZ events where both Z bosons decay to either a ete pair or a u u palr. You may assume that the total Higgs (h) production cross section is o, = 2 x 10' fb, the branching fraction for a Z boson decay to a ee pair is 3.36%, the branching fraction for a Z boson decay to a "u pair is 3.36%, and the branching fraction for a Higgs boson to decay to a pair of Z bosons is 2.7%. Enter your answer in the box below rounded to the nearest integer (e.g. 1234.4 should be entered as 1234). Ancwerarrow_forwardwhich 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 radiationarrow_forward
- 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 mearrow_forwardWhat is the relationship between the excitation wavelength (λex) and emission wavelength (λem) in atomic spectrophotometry (e.g. flame or furnace atomic absorption spectrophotometry)? Why is this different from molecular spectrophotometry?arrow_forwardFluorometry is more selective and more sensitive than absorption spectrometry.Tell what is meant by selectivity and sensitivity.arrow_forward
- 5. A solution prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 µg S/mL, and diluting to 50.0 mL. The measured signal quotient was (signal due to X/signal due to S) = 1.90/1.000. a. In a separate experiment it was found that, for equal concentrations of X and S, the signal quotient was (signal due to X/signal due to S) = 0.930/1.000. Find the concentration of X in the unknown. b. Answer the same question if in a separate experiment it was found that for the concentration of X equal to 3.42 times the concentration of S, the signal quotient was (signal due to X/signal due to S) = 0.930/1.000.arrow_forwardWhich of the following statement is incorrect? The quality of grating of the monochromator affects the resolution of two closely spaced wavelengths in a spectrum. OICP (Inductively coupled plasma) is commonly used in atomic emission spectrometry. Cuvette is generally used for atomic absorption spectrometry (AAS) as the sample cell. The measurement in fluorescence spectrometry is generally more sensitive than absorption spectrometry.arrow_forwardI need the answer as soon as possiblearrow_forward
- Suppose a student is preparing a set of standard solutions for use in a spectrophotometric study. If percent transmittance, %T, were measured in the standard solutions before the color had a chance to fully develop, the measured value would be compared with solutions that have allowed the color to fully develop.arrow_forwardTo determine the instrument detection limit of Pb2+ ions, a student made 10 blank solutions and measured their signals. The standard deviation of the signals are 0.199. Then the student made a series of Pb2+ standard solutions (concentration range is 2.00 ppm to 15.00 ppm) and measured their signals. The equation of the calibration curve is: y = 3.413 x+ (b). What is the instrument detection limit of Pb2+ in ppm? %3Darrow_forward0.1040 g of a solid sample containing copper was dissolved by acid and transferred to a 250.00 mL volumetric flask and volume was made up with distilled water. The solution was then diluted by a factor of 20. The final solution was analyzed by atomic absorption spectrophotometry and the concentration was found be 3.109 ppm, What is the weight percentage of copper in the original solid sample? Keep four significant figures in your final answer. Do not try to include the "%" in your answer. e.g. if your final answer is 10.01%, only write 10.01 in the box.arrow_forward
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning