How does one determine that one has a false positive result

Reference no: EM131202478

1. What are the advantages of color and TLC tests? Under what circumstances might a color test be preferred over TLC ?

2. TLC data have been used as evidence in court cases. What do you think of this practice ?

3. How does one determine that one has a false positive result ?

4. What difficulties can one encounter when conducting a microcrystal examination ?

5. When treated with Duquenois reagent, the extract of a suspect substance turned gray. How could you tell whether the substance contained marijuana, tobacco, or tea leaves ?

Reference no: EM131202478

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How does one determine that one has a false positive result : When treated with Duquenois reagent, the extract of a suspect substance turned gray. How could you tell whether the substance contained marijuana, tobacco, or tea leaves ?

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