Table of Contents
- 1 What is spectrophotometry How can this be useful in identifying drugs quizlet?
- 2 Which type of spectrophotometry provides a complete confirmation of a substance’s identity?
- 3 What are the two analytical phases for the possible identification of a substance?
- 4 Why is it important for forensic scientists to be able to identify particular drugs?
- 5 How is the composition of a substance determined by forensic scientists?
- 6 What are the two phases in a forensic scientists analytical scheme?
What is spectrophotometry How can this be useful in identifying drugs quizlet?
Uv-vis spectrophotometry can be used to confirm the presence of some analytes but is mostly used to quantitate the amount of substance in a sample. IR spectrophotometry can be used to confirm the identity of a substance unambiguously and it can also be used to quantitate the amount of a substance in a sample.
Which type of spectrophotometry provides a complete confirmation of a substance’s identity?
By contrast, different substances have unique infrared spectra, so infrared spectrophotometry can provide definite identification of any substance.
What are the two analytical phases for the possible identification of a substance?
What are the two phases in a forensic scientist’s analytical scheme? Screening and conformation. What is the difference between a screening test and a confirmation test? A screening test reduces the possible number of substances in an unknown sample to a smaller number.
What is defined as the physiological need for a drug that has been brought about by its regular use?
Define physical dependence. The physiological need for a drug that has been brought about by its regular use.
How is spectrophotometry useful in identifying drugs?
To test a sample, spectrophotometers test how the light refracts and reflects off a particular material and analyze its color, infrared and ultraviolet properties and more. Using spectrophotometry, you can tell the difference between similar samples of hairs, fibers, drugs, bodily fluids and fingerprints.
Why is it important for forensic scientists to be able to identify particular drugs?
The forensic scientist must be able to tell the difference between the substances. It is important for forensic scientist to be able to identify particular drugs so they have evidence for the case that a certain drug was present.
How is the composition of a substance determined by forensic scientists?
Substances will crystallize in a specific manner allowing analysts to identify components of a sample by viewing the crystals under polarized light. Ultraviolet spectroscopy works by exposing the material to UV light and measuring the way the material absorbs the light.
What are the two phases in a forensic scientists analytical scheme?
The two phases in a forensic scientist’s analytical scheme are screening and confirmation. What is the difference between a screening test and a confirmation test? A screening test is used to reduce the possible number of substances in an unknown sample to small and manageable number.
What is the most widely used illicit drug in the United States quizlet?
Marijuana is the most commonly used illicit drug in the United States.
How is spectroscopy used in forensic science?
Spectroscopy has proven to be a non-destructive method for successfully analyzing different bodily fluids as well as other types of forensic materials such as drugs or fingerprints. This helps forensic scientists put various pieces of information together in order to answer questions and draw conclusions about crimes.