:: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Categories >> Sciences >> Chemistry >> Analytical Chemistry


 Organic Chemistry interview questions  Organic Chemistry Interview Questions (222)
 Inorganic Chemistry interview questions  Inorganic Chemistry Interview Questions (96)
 Analytical Chemistry interview questions  Analytical Chemistry Interview Questions (849)
 Physical Chemistry interview questions  Physical Chemistry Interview Questions (57)
 General Chemistry interview questions  General Chemistry Interview Questions (283)
 Chemistry AllOther interview questions  Chemistry AllOther Interview Questions (71)
What is primary & Secondary Standard ? Give Example
 Question Submitted By :: Analytical-Chemistry
I also faced this Question!!     Answer Posted By  
# 1
Primary standard :
Primary standards are the materials having high purity
values under specified conditions which can be used to
standardise the volumetric solutions.This primary stadards
also used to prepare the solutions which are necessay for
the calibration of analytical instruments.

Secondary standards:
Generally volumetric solutions are
known as secondary standards
Is This Answer Correct ?    101 Yes 29 No
# 2
Primary standard are the compounds having reagent(analyte)
of high purity and can directly used for perpration of
standard solutions.
Example:- Nacl is primary standard for AgNO3
NaOH is primary standard for HCl

Secondary Standard solutions are analysed against primary
standard solutions. Basically these are perpared in
laboratory for specific analysis.
Is This Answer Correct ?    6 Yes 5 No
Kamal Kishore Kashyap
# 3
For example in pharmaceutical chemistry primary standard will be pharmacopoeia's standard - USP or CRS, but they are very expensive. So you can fully characterize your "in house" material as your primary standard and use it for analysis. All next batch of standard, characterized vs. primary will be secondary standard. A part of primary standard should be stored for secondary standards characterizations. 
Is This Answer Correct ?    22 Yes 23 No
# 4
primary std thats stdrd solution can be prepare but secondry thats stdnrd solution can not be prepared

eg. acetic acid is primary std but sulfuric acid is secondry
Is This Answer Correct ?    2 Yes 3 No
Nisha (college Student)
# 5
Primary standard :
the Primary standards are the NIST ,ISO ASC Standard
tracible materials
.This primary stadards
the solutions which are use for
the calibration of analytical instruments.
also used to standardization of std( Normal & Molar solution

Secondary standards:
are use to routine analysis known as
secondary standards for but Secondary standards are liquid
calibration of analytical instruments.
also used to standardization of std( Normal & Molar solution
Is This Answer Correct ?    33 Yes 52 No
Kishanpal Singh Fare Labs Gurg

Other Analytical Chemistry Interview Questions
  Question Asked @ Answers
What is Specificity ? Dr-Reddys 5
How to now that my acid is contact with base or base is contact with acid in drugs, is there any techniq to identify the formation of salt(drug) Reddy-Labs 1
What is blank titration of potentiometrically.   2
what is difference of uv and pda MSN-Pharma 12
Why Methanol used in KF Titration? Lupin 7
what r the reasons to get peak telling? Cipla 6
How to interpret XRD graphs against standard and limit for same? NCL 3
How will decide to use HPLC OR GC for developing method for unkown compund   5
what is difference between assayand potency Hetero 3
why water, methanol, ethanol ets solvents are used in UV SPECTRIPHOTOMETER for blank reading ?   7
why we are analyzing purity on HPLC why not in gc Aurobindo 3
For more Analytical Chemistry Interview Questions Click Here 

Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
Copyright 2013  All Rights Reserved.   ::