In Atomic Absorption Spectroscopy, with what material is the
cathode in Hollow cathode lamp
constructed?
In Atomic Absorption Spectroscopy, with what material is the cathode in Hollow cathode lamp constructed?
Question 9 (5 points) Hollow cathode lamps a) have an anode made of the element(s) the lamp is intended to analyze for. b) have a cathode made of the element(s) the lamp is intended to analyze for. c) are filled with either Neon or Argon gas. are always made with a mercury cathode. d) e) a and b f) a and c g) a and d h) b and c i) b and d Question 21 (1 point) Hollow cathode...
With the aid of a clearly labelled diagram, briefly, but informatively, describe a hollow cathode lamp (HCL) commonly used in atomic adsorption spectroscopy (AAS) (b) What other source is used for AAS instead of HCL?
Select all the X-ray spectroscopy sources O Select all that apply Hollow cathode lamp B X-ray tube Electroless discharge lamp Synchrotron E radioisotope sources LASER Deuterium lamp Mercury-vapor discharge lamp I LED
Discuss why a hollow-cathode lamp (HCL) may be more suitable than a monochromatic laser source for atomic absorption measurements. Be as specific and detailed as possible. Include in your answer a sketch of a HCL and label the main parts.
Explain why analytical measurements would deviate from Beer's Law if the hollow cathode lamp emission were broader than the absorption profile of the absorbing species. If the true widths of the spectral lines emitted by the hollow cathode lamp are on the order of 0.02 - 0.05 Å, what causes your measured Ca line to appear so broad? my measured full width at half maximum was 0.5A.
Would atomic emission spectroscopy be a useful technique for determining the oxidation state of arsenic in a water sample? Why or why not? (Bonus, what would an analyst have to do to determine oxidation state? (otherwise referred to as "speciation")) List two reasons why the excitation bandwidth using a hollow cathode lamp is much narrower than the emission bandwidth for atomic spectroscopy? Use an equation in your answer (hint, think Doppler).
Atomic emission spectroscopy is more sensitive to flame stability compared to atomic absorption spectroscopy. Briefly explain why.
Label the components of the atomic absorption experimental schematic below. Then match the component with its description. Each component will be used once when labeling the diagram and once when matching to the description. Po Fuel Monochromator Air Flame Hollow- cathode lamp Detector Sample It is composed of the same element that is being analyzed in the sample. It is used to atomize the sample. It is used to select one line of radiation from the source and remove as...
Define the terms “Releasing Agent” and “Ionization Suppressor” as it relates to atomic absorption spectroscopy. Make sure to indicate their application in the definition.
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 μL of a 1000.0 μg/mL Cd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table. Absorbance Reagent blank 0.023 Sample 0.498 Sample plus addition 0.714 What is the concentration of the cadmium in the waste stream sample?