Forensics

Forensics

Forensics is a chemistry event that involves identification of powders, identification of polymers, identification of fibers, identification of hair samples, blood serum analysis, interpretation of chromatography, and fingerprint analysis.

Ways to Identify Powders:

Flame test** Tests with liquids: Iodine, Sodium Hydroxide, Hydrochloric Acid, Benedict's solution, Water pH conductivity

Ways to Identify Polymers:

Flame tests** Density

Ways to Identify Fibers:

Flame tests**, check results with senses ( ie: smell)

Usually at competition, it's hard to do flame tests because you are given a candle or something. However, Never have I been given a Bunsen burner. Also, burn tests for polymers and fibers may not be allowed at some competitions, but they will give you the results. So you have to know other ways to identify them, such as density, color, or texture. The last 2 work only for fibers because the polymers are all clear and well, all feel like plastic.

Hints for identifying powders, try to use solubility, how they react with the chemicals provided, as well as ph. Burn tests can be used if necessary, but are only effective with K, B, and Li compounds because their color is really distinct.