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Ray Atkinson
Ray Atkinson, Graduate Student
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Experience:  Inner-city high school substitute teacher. Degrees in mathemetics, accounting, and education. Years and years of tutoring.
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How do I determine how much cocaine is present in the original

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How do I determine how much cocaine is present in the original sample if an extraction of
cocaine is 80% efficient and GCMS quantitation shows that 150 mg of cocaine is present in the extracted sample?

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Customer: replied 3 years ago.

Makes sense. For the calculation, would you simply word it as... concentration (extracted)/extraction efficiency = original concentration or is there a more official/technical way to word it? Thanks.

Yes, that would be a good way of defining it. One of the secrets of math is getting the formulas in your head in a way that it will stick.
Results / efficiency = original
150 / 0.8 = 187.50

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