Question

Retention Height Width 1/2 Peak Time (min) (mm) (min) A 1.82 1,922 0.036 B 3.63 1,369 0.071 C 7.69 1,282 0.090 The above separation was performed on a 80 m column. What is the average HETP value (in cm) calculated from the above GC separation data? Type your answer rounded to the 3rd decimal place without units.

Answer 1

. HETP = Length of column (em) Number of Theoretical plates Number of Theoretical plate = 5.54 Retension time 12 I peak width at hall) " height z 5.5ux 5.54 x 1 for Peak A. N= 5:54 8/1.82 ² 0.036 ) - 14 159 number HET PAS Set om HETPA (cm) 80m x 100 cm 14159 Bogu isto com 0.565 cm for Peak B N = 5:54 x (3.6 0.071 - 261 3.9 ~ 2614 number

ИСТРc(cm 80 X 100 um 2614 3.06 cm For Peak C, N=5.54 7300 number HETP. (om? 80 x 100 cm 1.095 cm - 7300 Average HETP value (cm) = HETPA THE TPB + HETRE 3 . 0.565 + 3.06 + 1.095 3 1.5733cm = 1.573 cm Capto 3rd decimal place)