Interested to Buy Any Domain ? << Click Here >> for more details...
what is deference b/w the working standard and reference
standard
- 4 Answers
- 27700 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / tushar
Reference std is like USP,EP std , in this std we get COA
including results of Potency by HPLC , NMR & XRPD data.
whenever there is requirement of w.std preparation first we
have get API rawmaterial from warehouse & we check assay ,
water content or LOD & Related substances aganist reference
std . Some times we are doing analysis in duplicate & get
mean value.then we decide final assay or potency value &
it's validity one year
| Is This Answer Correct ? | 46 Yes | 3 No |
Answer / vipul patel
Reference standard is primary standard.they are provid by Pharmacopoeia (like USP,Phone.Eur.JP etc).they no need other Qualifications
Working standard is Secondary standard .they make by Reference standard. They need other Qualifications like Assy,RS,LOD,
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / suresh
The reference standard otherwise called as the primary
standard. It contains maximum % purity and minimum level
impurity.
Working standard can be prepared from reference standard at
various concentration by dilution.
| Is This Answer Correct ? | 6 Yes | 9 No |
Answer / minoo
as i know, we should measure the assay against refrence standards at least two times. in different days by different instruments. then we should calculate linearity and validity , if they are ok we can use the tested material as working standard.
| Is This Answer Correct ? | 3 Yes | 7 No |
what is the dipolement and how it is related to IR
1 Answers AJ Square Inc, Aurobindo,
What are the limits for uniformity dosage content for tablets and capsules
why we are using in ph calibrations ph4,7,9.2 buuffers only?
3 Answers Reddy Labs, Unichem,
We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy
what is the differance between Analytical and semi micro balance?
How to prepare 50 ppm ammonia solution form 25% ammonia solution?
How to prepare 1000ppm methylene blue solution
what is mean by dissolution biowaiver study?
How to estimate potassium?
what is mean by peak intigrity?
what is the difference between mcg and ppm?
some compound havving uv region but not give much more response during hplc analysis
Organic Chemistry 
