(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
- What are the disadvantages of uses the Thick layer stationary phase in Thin layer Chromatography (TLC)? Please shortly write at your own words. (4-5 lines maximum ).arrow_forwardWhat safety precaution are needed when working with a.) centrifuge b.) Inductively Coupled Plasma mass spectrometry (ICP-MS) c.) stirring hot platearrow_forwardAs a forensic toxicologist, you have been given a task on determining amount of cadmium, mercury, chromium, copper and lead metal contents in medicinal herbs using flame atomic absorption spectroscopy (AAS). Hollow cathode lamp (HCL) was selected as radiation source for this analysis. The highest concentration came from lead element followed by chromium and copper, however cadmium and mercury were not detected in the sample. a) Based on your knowledge, conclude whether the above result is valid or not. b) If you are given an option of electrothermal or flame atomizer for above case study, determine which one is suitable and justify your answer.arrow_forward
- (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?arrow_forwardWhy is the blank solution needed in spectrophotometry? A. A blank solution is used to clean the spectrophotometer b. A blank solution is used to calibrate the spectrophotometer readings: they document the baseline response of the environment- instrument- sample systemarrow_forwardHere are materials used for the basic spectrophotometer experiment:1. Paper template2. Scissor3. Light source (i.e. torchlight, portable light)4. Paperboard (black colour)5. Unused compact disc (CD)6. Camera detector (i.e. webcam, laptop, mobile phone) identify the functions for each component involved in this experiment.arrow_forward
- What is the actual or real-life application of electrogravimetric analysis? Include the specific methodology.arrow_forwardExplain why the information from an XPS chemical shift must also be contained in an X-ray absorption edge.arrow_forward(a) Three components in a mixture have varying distribution constants between the mobile phase and the stationary phase. One of the components has a very high distribution constant. Would this component likely elute first or last and how would you design an experiment or modify the components of the separation to make it perform in the opposite manner? (b) One way to dramatically increase the sensitivity of a quadrupole mass spectrometer is to use a technique called selected ion monitoring (SIM). Explain how this technique works and why it improves sensitivity. Explain what dwell time means. Be sure to draw a diagram and describe how this analysis scheme works. Also, is there a compromise between a wide range of masses scanned and SIM? Explain in easy details.arrow_forward
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning