Match the ff. definition/use with the correct light source being described. contains iodine which is added to the filling gas that extends the lifetime of the lamp (Choose] [Choose] tungsten filament lamp hollow cathode lamp nernst glower globar mercury arc lamp deuterium lamp specifically used for atomic absorption spectroscopy emits continuum radiation when molecule is stimulated by electrical energy tungsten halogen lamp consists of zirconium and yttrium oxides heated by electricity Choose )

Match the ff. definition/use with the correct light source being described. contains iodine which is added to the filling gas that extends the lifetime of the lamp (Choose] [Choose] tungsten filament lamp hollow cathode lamp nernst glower globar mercury arc lamp deuterium lamp specifically used for atomic absorption spectroscopy emits continuum radiation when molecule is stimulated by electrical energy tungsten halogen lamp consists of zirconium and yttrium oxides heated by electricity Choose )

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter25: Instruments For Optical Spectrometry

Section: Chapter Questions

Problem 25.1QAP

See similar textbooks

Similar questions

Use the data in Figure 4.8 to estimate the ratio of radiation intensity at 10,000 Å (infrared) to that at 5000 Å (visible) from a blackbody at 5000 K. How will this ratio change with increasing temperature? Explain how this change occurs.
About Atomic spectroscopy a) Explain the fundamental difference between the two main types of atomic spectroscopy: atomic emission and atomic absorption. Also explain the main difference in instrumentation between these techniques. Draw a sketch as support. b) Explain the advantages of using emission measurements in an inductive coupled plasma (ICP) instead of flame emission measurements. Motivate! c) Measurement of mercury (for example in Värmland Lakes) can be performed with flameless atomic absorption spectroscopy. Measurement with this technique gives a detection limit of about 0.01 ppb to compare with the determination of mercury in a flame that has a significantly lower detection limit, about 200 ppb. Explain why the flameless technology is so much more sensitive for measuring mercury. Please answer very soon will give rating surely All questions answers needed
Write a short note about IR spectroscopy instrumentation (source)? Please answer at your own words(to the pount).
An absorption measurement with a 1 cm path length yields a reading of 0.004 absorbance units with a noise of 0.001 absorbance units and a mean noise reading of 0 for 10 scans averaged together. Assuming the noise for a single scan does not change if the path length is increased to 6 cm and the number of scans is increase to 100, what is the signal to noise of the new measurement.
What percent transmittance range and what absorbance range are considered to be the optimum working ranges for spectrochemical measurements?
Derive an expression relating absorbance to the concentrations of standard and unknown ( c subscript s and c subscript x) and the volumes of the standards and unknown ( V subscript s and V subscript x ) as well as the volume to which the solutions were diluted (V subscript t). Derive expressions for the slope and the intercept of the straight line obtained in (a) in terms of the variables listed above.
A reflection diffraction grating has 1294 grooves per mm, and 13.4 mm of illuminated area. What must be the separation (in nm) of two first-order spectral lines centered at 625 nm if they are to be resolved? (Answer should be to 4 decimal places)
i) The transmittance of as solution measured at 590nm in a 1.5cm cuvette was 76.2%. ii) Calculate absorbance of above solution? iii) If the concentration is 0.0802 M, what is the molar absorptivity of this solution at given wave length? iv) If the molar absorptivity is 10000L/ (mol.cm), what is the concentration?
The percent transmittance (%T) is defined as: %T = (I/Io)*100. What does I stand for? Select one: a. intensity of emitted light by the pure solvent; b. intensity of light transmitted through the sample; c. intensity of emitted light by the sample; d. intensity of light transmitted through the pure solvent; e. all options are incorrect;
What are the nature of spectrum differences between Uv-visible and Fluorescence spectroscopy analysis? Please answer shorty at your own words. Answer should be to the point.
the transmittance concentration pairs could have been used to determine a calibration curve. state at least one important problem associated with such a calibration curve
Do your graphs show the trends a)you expected based on what you know about absorbance and transmittance using a spectrophotometer? Why or why not? b) why does absorbance data relate more conveniently to concentration that does transmission data?