{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

OTC drugs - A positive test is needed for each of the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Nakul Shah Forensics – Block 1 1/20/10 Testing Over the Counter Drugs Grounded White Powder Distilled Water Universal Indicator HCl Ferric Nitrate Aspirin Clumpy No Reaction Red & Orange 2 – 3 pH No Reaction Purple Brown Alka Seltzer Fine Fizzed, Produced Bubbles Red 1 – 2 pH Fizzed Quickly Bubbled Yellow Green Tylenol (Acetaminophen) Fine & Smooth No Reaction Rose/Yellow Green 5 – 7 pH Thickened Dissolved Black Unknown #3 Clumpy Dissolved Red – Orange 2 – 3 pH Thickened Yellow Why is there a need for a positive test for each of the substances?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: A positive test is needed for each of the substances to compare the results of the unknown in order to match it with one of the substances. What is a false positive? A false positive gives you the same reaction but it is not the same substance. Different substances can have similar reactions and therefore, the results can be misleading. Heavy Metal Test Potassium Chromate Lead Highlighter Yellow Mercury Yellow – Orange Unknown Highlighter Yellow...
View Full Document

{[ snackBarMessage ]}