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
Concept explainers
Question
Chapter 15, Problem 15.6QAP
Interpretation Introduction
Interpretation:
The major reasons for more usage of molecular fluorescence spectrometry in comparison to molecular phosphorescence spectrometry should be discussed.
Concept introduction:
Phosphorescence spectrometry is closely related to fluorescence. The transition from excited to ground state takes time in this type of photoluminescence process.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
What are the differences between a mass spectrometer and a IR spectrometer?
The levels of Vitamin B1 in a sample of milk was determined using the Standard
Addition method and technique of fluorescence spectroscopy.
18.0 ml of the milk sample was diluted to 20.0 ml using distilled water and then the
fluorescence was measured. The resulting signal was 210 units.
A spike was made by taking 18.0 ml of the same milk sample, adding 1.0 ml of a 6.0
ppm Vitamin B1 standard solution, and then diluting to 20.0 ml using distilled
water. The signal of the spiked milk was 540 units.
Calculate the concentration of Vitamin B1 in the original milk sample (in ppm).
Report to 3 decimal places.
Atomic fluorescence spectrometry is an attractive alternative to atomic absorption spectrometry for certain elements. For which elements is it best suited? Why?
Chapter 15 Solutions
Principles of Instrumental Analysis
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- In a mass spectrometer, two beams of singly ionized isotopes of uranium 23592U and 23892U are injected with velocity 1.4*105m/s into a magnetic field of strength 0.7 T normally. Compute the distance d between the two trace lines of the isotopes after they complete one semi-circle. (Given: masses of the isotopes are m235 = 3.9*10-25 kg and m238 = 3.95*10-25) a) 1.26 cm b) 0.63 cm c) 0.32 cm d) none of these.arrow_forward5arrow_forwardDIfference between different types of UV spectrometers based on their advantages and disadvantagesarrow_forward
- The maximum number of spectra that can be recorded per second by ToF-MS is limited by the time taken by the slowest ions to go from the source to the detector. If the slowest ion took 45.6 microsecond to travel, at what frequency could you record spectra if a new extraction cycle were begun each time this heaviest ion reached the detector? 30000 spectra/s 10000 spectra/s 11000 spectra/s 500 spectra/s 22000 spectra/sarrow_forwardThe chemical shift value (δ) is measured by the ratio of shift in Hertz and the operational frequency of the spectrometer in MHz, give the equation to calculate the shift valuearrow_forwardTrue or False 1. Photodiode arrays are devices within the instrument that help amplify the signal of a sample. 2. Atomic spectroscopy requires the atomization of a sample, which involves nebulization and eventually volatilization to form an elemental vapor. 3. Organic compounds are normally analyzed in atomic spectroscopy despite their small electronic transition range.arrow_forward
- How can we use the observed colors to determine quantities and identities of materials? I am highly confused by spectrometry.arrow_forwardAnalytical Chemistry II Compare between the advantages and disadvantages of atomic emission spectroscopy based on arcs and plasma.arrow_forwardIn order to measure riboflavin in a breakfast cereal, a 5.00-gram sample of the cereal was extracted with acetic acid and filtered. The extract was transferred to a 50.0 mL volumetric flask and diluted to the mark. The sample was transferred to a cuvette and the fluorescence was measured. The instrument read 59 units (Fluorescence units –an arbitrary scale). 24.00 mL of the cereal extract was sample was mixed with 1.0 mL of a riboflavin standard that was 0.500 ug/mL. The fluorescence of this mixture was measured and read 94 fluorescence units. Calculate the concentration of riboflavin per gram of cereal (use µg/gram of cereal).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