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Who discovered X-ray
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why inject diluted standard solution in related substance analysis by HPLC?
What is the limit for single maximum impurity limit as per USP??
why we are using polystyrene film for calibration of I.R spectroscopy?
12 Answers Abbott, Andhra Organics, Intas, Kemwel, Reddy Labs, RRR, Veritas, Zydus Cadila,
what is use in calibration of conductivitimeter?
1 Answers Claris Lifesciences, SRF,
cefoperozone and sulbactam inj. hplc test method
0 Answers Graviti Pharmaceuticals,
I have got selected for Aurobindo Pharma AR&D, HR person is asking me to sign in agreement. can I join?
How precise should be the linearity in HPLC method validation?
How do we fix the sample concentaryion in hplc method development. What is the basis?
In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?
If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately
What is third generation HPLC Columns?
How to use RF and rrf in Rs calculation( either multiply or divide)?
Organic Chemistry 
