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Categories >> Sciences >> Chemistry >> Analytical Chemistry
 
 


 

 
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 Analytical Chemistry interview questions  Analytical Chemistry Interview Questions (866)
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Question
HOw do i calculate the number of theoretical plate on  a HPLC 
chromatography
 Question Submitted By :: Analytical-Chemistry
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
We can use the following formula for calculation of the Theoretical plates(N).


N = 16*[TR/W]2

Here N = Theoretical plates
TR = Retention Time
W = Peak width
 
Is This Answer Correct ?    42 Yes 2 No
Siri
 
Answer
# 2
Theoretical plates(N):-

N = 5.55 x [RT/W]2

Here N = No. of Theoretical plates
RT = Retention Time
W = Peak width at half the hight of peak


Suppose RT of peak is 20 min. & Hight is 10 mm

Then W = 10/2 = 5


so N = 5.55 x [20/5]2

= 5.55 x [4]2
= 5.55 x 16 = 88.80
 
Is This Answer Correct ?    21 Yes 10 No
Daljit Singh Randhawa
 
 
 

 
 
 
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