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Categories >> Sciences >> Chemistry >> Analytical Chemistry
 
 


 

 
 Organic Chemistry interview questions  Organic Chemistry Interview Questions (221)
 Inorganic Chemistry interview questions  Inorganic Chemistry Interview Questions (95)
 Analytical Chemistry interview questions  Analytical Chemistry Interview Questions (833)
 Physical Chemistry interview questions  Physical Chemistry Interview Questions (57)
 General Chemistry interview questions  General Chemistry Interview Questions (282)
 Chemistry AllOther interview questions  Chemistry AllOther Interview Questions (65)
Question
wt is rsd in and explain
 Question Submitted By :: M.dinesh
I also faced this Question!!     Rank Answer Posted By  
 
  Re: wt is rsd in and explain
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 2 No
Janagamshyam
 
  Re: wt is rsd in and explain
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
 
 
 
  Re: wt is rsd in and explain
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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