Podcast
Questions and Answers
What is the purpose of comparing the chromatographic pattern of an unknown sample to known petroleum products?
What is the purpose of comparing the chromatographic pattern of an unknown sample to known petroleum products?
- Determining the explosive nature of the unknown sample
- Identifying the source of the unknown sample (correct)
- Assessing the color of the unknown sample
- Measuring the density of the unknown sample
Where can a forensic analyst find a searchable library to compare the chromatograms of accelerant standards?
Where can a forensic analyst find a searchable library to compare the chromatograms of accelerant standards?
- Local library archives
- Forensic journal articles
- Chemistry textbooks
- ILRC website (correct)
What technique can simplify complex chromatographic patterns in forensic analysis?
What technique can simplify complex chromatographic patterns in forensic analysis?
- Gas chromatography/mass spectrometry (correct)
- Column chromatography
- Paper chromatography
- Thin-layer chromatography
What is the characteristic nature of explosives that distinguishes them from other substances?
What is the characteristic nature of explosives that distinguishes them from other substances?
Which of the following is an example of a low explosive used widely?
Which of the following is an example of a low explosive used widely?
What is the term for the speed of decomposition exhibited by low explosives confined to containers?
What is the term for the speed of decomposition exhibited by low explosives confined to containers?
What is the purpose of placing a charcoal strip in the airtight debris container during heating?
What is the purpose of placing a charcoal strip in the airtight debris container during heating?
How are the volatile residues in fire-scene debris trapped during the laboratory recovery process?
How are the volatile residues in fire-scene debris trapped during the laboratory recovery process?
Why is a syringe used after heating the container during laboratory recovery of flammable residues?
Why is a syringe used after heating the container during laboratory recovery of flammable residues?
What role does the solvent play in the vapor concentration technique?
What role does the solvent play in the vapor concentration technique?
Why is gas chromatography considered a sensitive and reliable instrument for detecting and characterizing flammable residues?
Why is gas chromatography considered a sensitive and reliable instrument for detecting and characterizing flammable residues?
How can a forensic analyst identify the accelerant used in an arson case using gas chromatography?
How can a forensic analyst identify the accelerant used in an arson case using gas chromatography?
What is the purpose of using the ion mobility spectrometer mentioned in the text?
What is the purpose of using the ion mobility spectrometer mentioned in the text?
Why is it essential to collect and preserve loose soil and debris from the interior of a crater at the origin of an explosion?
Why is it essential to collect and preserve loose soil and debris from the interior of a crater at the origin of an explosion?
What is the purpose of rinsing recovered debris with organic solvents in forensic analysis?
What is the purpose of rinsing recovered debris with organic solvents in forensic analysis?
Why is it important to use sealed air-tight containers for materials collected for laboratory examination?
Why is it important to use sealed air-tight containers for materials collected for laboratory examination?
What type of testing procedure is NOT mentioned as part of the analysis conducted on recovered debris?
What type of testing procedure is NOT mentioned as part of the analysis conducted on recovered debris?
Why are confirmatory identification tests performed on unexploded materials?
Why are confirmatory identification tests performed on unexploded materials?
