Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 20, Problem 20.14QAP
Interpretation Introduction
(a)
Interpretation:
The general expression that relates the ratio of the accelerating voltages to the ratio of corresponding
Concept introduction:
Peak matching is a process in which there is rapid switching between the accelerating voltages while the other conditions are kept constant.
Interpretation Introduction
(b)
Interpretation:
The
Concept introduction:
Peak matching is a process in which there is rapid switching between the accelerating voltages while the other conditions are kept constant.
Interpretation Introduction
(c)
Interpretation:
The conclusion about the answer in part (b) and the compound is to be stated.
Concept introduction:
Peak matching is a process in which there is rapid switching between the accelerating voltages while the other conditions are kept constant.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
(b) An aqueous solution whose concentration is 0.00344 M was analysed
using spectrophotometer with a molar absorptivity of 412 cm-1 mo1 L in
a cell with a 2.00 cm pathlength. Calculate the absorbance and
transmittance for the above solution.
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 me
(a) You measure the percent transmittance of a solution containing chromophore X at 400nm in a 1-cm path length cuvette and find it to be 50%. What is the absorbance of this solution?
(b) What is the molar absorptivity of chromophore X if the concentration of X in the solution measured in question (a) is 0.5mM?
(c) What is the concentration range of chromophore X that can be assayed if, when using a sample cell of path length 1, you are required to keep the aborbance between 0.2 and 0.8?
Knowledge Booster
Similar questions
- 7) A 25.0 ml sample containing Cu gave an instrument reading of 23.6 units (corrected for a blank). When exactly 0.500 ml of 0.0287M Cu(NO3)2 Was added to the solution,the signal increased to 37.9 units. Calculate the molar concentration of Cu" in the sample +2,arrow_forward(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?arrow_forward(B) A 0.05 mM solution of DCPIP was placed in a 1 cm spectrophotometer cuvette and a beam of light at 600nm was passed through the cuvette. The extinction coefficient for DCPIP is 3500 L/mole/cm under the specific conditions used. What proportion (as a percentage) of light would emerge from the other side of the cuvette?arrow_forward
- Exactly 5.00 mL aliquots of a solution containing analyte X were transferred into 50.00-mL volumetric flasks and the pH of the solution is adjusted to 9.0. The following volumes of a standard solution containing 2.00 µg/mL of X were then added into each flask and the mixture was diluted to volume: 0.000, 0.500, 1.00, 1.50 and 2.00 mL. The fluorescence of each of these solutions was measured with a fluorometer, and the following values were obtained: 3.26, 4.80, 6.42, 8.02 and 9.56, respectively. ii. Using relevant functions in Excel, derive a least-squares equation for the data, and use the parameters of this equation to find the concentration of the phenobarbital in the unknown solution.arrow_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_forward1. State the difference between transmittance, absorbance, molar absorptivity, and fluorescence. Which one(s) is proportional to analyte concentration?arrow_forward
- Q6. (a) Describe the differences between a linear TOF mass spectrometer and an orthogonal TOF instrument? What are the advantages and limitations of these two geometries? * (b) What function does the ICP torch have in ICPMS? (c) Why has ICPMS become an important and widely used analytical method?arrow_forwardA 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?arrow_forwardDetermining the sodium concentration in coffee with flame atomic absorption spectroscopy (FAAS) can be challenging due to interferences. To overcome these interferences, lithium is commonly used as an internal standard. A researcher prepared a sample with an internal standard (Lit) to analyte (Na+) concentration ratio of 2.00/1.00. The ratio of the internal standard signal to the analyte signal (Li+ signal/Na+ signal) was found to be 1.170/1.000. Determine the response factor, F. F = A sample was then prepared containing 12.70 mL of coffee and 4.80 mL of 5.20 ppm Lit, and diluted to a 50.00 mL total volume. The ratio of the internal standard signal to the analyte signal in the unknown sample was found to be 0.890/1.000 (Li+ signal/Na+ signal). Determine the unknown concentration of Na+ in the coffee sample. [Na+] = ppmarrow_forward
- Pls ans botharrow_forwardWhat accelerating voltage would be needed to analyze for N2+ (MW = 28.01) using a magnetic sector mass spectrometer. The magnetic field was 0.352 Tesla and the radius of curvature was 12.2 cm (1 T = 1 Vs/m2)arrow_forward3. Explain the main differences between flame atomic absorption spectrophotometry and UV-VIS molecular absorption spectrophotometry in terms of: (a) (b) energy levels and transitions; main instrumental features.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning