What is difference between Primary and secodary reference
standard?
- 2 Answers
- 18551 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / narasimha murthy
A primary standard is a reagent that is extremely pure,
stable, has no waters of hydration, and has a high
molecular weight
A secondary standard is a standard that is prepared in the
laboratory for a specific analysis. It is usually
standardized against a primary standard.
| Is This Answer Correct ? | 52 Yes | 7 No |
what is the principal of malvern particle sizer & its used in pharma industry
if the purity is 99.9%,is need to do assay?
why don't we call POH meter? As we all as PH meter
Explain about empower software of analysing?
Do you have experience with organic extractions or tissue digestions?
Dear sir, This is R.Kadambavadani working in a pharma industry. while doing RS analysis of ibuprofen API, unknown peak eluting some times in the 0.6 Min RT. Kindly send me what is the exact reason behind that. also am using ACN the mobile phase.
what is custom fields in waters system?
1 Answers Akorn India, Aurobindo,
In Karl fischer titrator what medium we can choose to analysing aldehyde and ketone samples by using KF reagent
what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?
some compound havving uv region but not give much more response during hplc analysis
Why to use propyl paraben in HPLC gradient calibration
how to prepare solution in ppb
Organic Chemistry 
