proteins and antibodies have several different types
blood stain characterization 1. is the sample blood
2. is the sample human blood? what species if not human?
3. what is the blood type
4. is DNA testing required?
layers of blood when centrifuged
white blood cells
red blood cells
an analgesic or pain killing substance that depresses body functions
narcotic drugs are analgesics
morphine, heroin, meth, codeine
The use of quality control techniques associated with a process.
HPLC can be used for.
examination of street drugs
forensic toxicology toxicology in the analysis of eviden
dry extraction use a solvent to dissolve and remove the compound of interest from the sample
- like dissolves like - ability of substance to dissolve in a liquid can
change with the liquid environment
- basic drugs dissol
Scott reagent cocaine
nonspecific drug analysis techniques chemical color tests
melting point tests
moderately specific tests
specific examination IR spectroscopy
An instrument that links a microscope to a spectrophotometer.
view a particle under the microscope while a beam of light is directed at the sample to get its
absorption spectrum (visible or IR)
scanning electron microscope
disadvantages of atomic absorption spectrophotometry
can only identify one element at a
time (have to select the proper lamp to match the element each time)
most useful in determining concentration
atomic absorption vs. atomic emission spectrophotometry a
atomic absorption spectroscopy process
- sample heated to high enough temp to vaporize
- vaporized atoms are hit by light beam (wavelength selected for particular element)
- light is absorbed if that element is present
- the concentration of the abs
destroys the compound, use high speed beam of electrons to ionize sample
(eject an electron), a particle accelerator put charged particles in flight, a magnetic field deflect
the accelerated cationic fragments and a detector records the