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Categories >> Sciences >> Chemistry >> Analytical Chemistry
 
 


 

 
 Organic Chemistry interview questions  Organic Chemistry Interview Questions (227)
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 Analytical Chemistry interview questions  Analytical Chemistry Interview Questions (859)
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 Chemistry AllOther interview questions  Chemistry AllOther Interview Questions (71)
Question
wt is rsd in and explain
 Question Submitted By :: Analytical-Chemistry
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
RSD means Relative standard deviation. If we inject same
sample 5 injections the deviation b/w these area or RT is
called as RSD

RSD = Standard deviation *100/mean(area or RT)
 
Is This Answer Correct ?    43 Yes 3 No
Janagamshyam
 
Answer
# 2
RSD = Standard Deviation/ Average * 100

Average is '(same sample is analyzed for 5 times with the
same conditions of instrument)the average of results.

RSD used to Know the precision. If the RSD is less than 3%,
That is precision is good.
 
Is This Answer Correct ?    1 Yes 1 No
Srikanth
 
 
 
Answer
# 3
Relative Standard Deviation.
RSD= S.D*100/ Mean.

In short This is to Explain the UNCERTANITY in your Analytical Result. We don't Know the true Value.

Uncertanity can be Quantified in different ways.

I Know the following
1.Significant figures method
2.Error propagation Method and
3. Statistical Method
 
Is This Answer Correct ?    0 Yes 0 No
Rama Rao Kethineni
 

 
 
 
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