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Deffense [45]
3 years ago
15

A peak elutes from a column at 33.9 min, with a width at half height of 10.4s. How many theoretical plates does this column have

?
Chemistry
1 answer:
nadezda [96]3 years ago
8 0

Answer:

212724 plates

Explanation:

To solve this problem we use the formula:

N = 5.54 (<em>tr</em>/W₀.₅)²

Where

  • N is the number of theoretical plates,
  • <em>tr</em> is the retention time (33.9 min)
  • and W₀.₅ is the peak width at half height (10.4 s).

We <u>solve for N</u>:

  • 10.4 s⇒ 10.4 / 60 = 0.173 min
  • N = 5.54 (33.9/0.173)²
  • N = 212724 plates
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