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Question { Vimta Labs, 13726 }
What is the purpose & importance of using the
polystyrene film in ir calibration?
Answer
DURABILITY AT ANY TEMPARECTURE.
POLYSTARENE FILM GIVES SHARP PEAKS WHICH COVER WHOLE IR
RESION.
| Is This Answer Correct ? | 9 Yes | 3 No |
Question { 8394 }
what are the role of MR
Answer
SO IDENTIFIED MELTING POINT IS SAMPLE.
| Is This Answer Correct ? | 3 Yes | 2 No |
Question { 14194 }
why using buffers in hplc inteed of water
Answer
BUFFERS PH IS ALLWAYS (+) OR (-)1
BECAUSE IS USED PHASPATE OR ACETATE BUFFERS IS USED
| Is This Answer Correct ? | 1 Yes | 2 No |
Question { 11673 }
I got 88.0 % assay for a drug in HPLC analysis for same
injection i got 40.0% related substances is it possible?
what is the relation between results of assay and purity?
Answer
BUT ASAAY IS QUANTITATIVE ANALASIS.
EXP:-
CIPROFLOXACINE EXP
THIS PRODUCT PURITY IS 99.5% BUT ASSAY IS 99.8%
THE SAME PRODUCT PURITY IS 99.5% BUT ASSAY IS 80.0%
THE SAME PRODUCT PURITY IS 99.5% BUT ASSAY IS 50.0%
BECOUSE PURITY IS NOT DEPEND UP ON THE ASSAY.
| Is This Answer Correct ? | 11 Yes | 1 No |
Question { Rakshit Drugs, 19004 }
why we use polystyrene film for ftir calibration?
Answer
it is highly durability.
polystyrene film is all bands executed which cover whole IR
Region.
| Is This Answer Correct ? | 7 Yes | 2 No |
Question { MSN Pharma, 33209 }
In case of HPLC coloums what is the difference Between C8 &
C18 coloums & how can we select difference type of coloums
like Inertial ODS , Hypersil BDS , ODS etc.?
Answer
These are (1)Normal phase columns
(2)Reverse phase columns
C18 And C8 COLUMNS both are reverse phase columns.
C18 columns is highly polar columns compare with C8 columns
C18 Column Structure is OH-Si-C18 linkage
C8 Column Structure is OH-Si-C8 linkage
These columns is depend up on the compound natchere
ODS means OCTA DECYLE SILANE. This types of columns
is used mainly acidic nacture compounds.
BDS means BASE DEACTIVATED SILANE. This types of columns
is used mainly basic nacture compounds.
| Is This Answer Correct ? | 19 Yes | 10 No |
Question { Pharmaceutical, 33568 }
Why triethylamine and o-phosphoric acid used while setting
pH of mobile phase during HPLC Analysis?
Answer
USED pH ADJUSTMENT PERPASE
BECOSE
1)GOOD RESOLUTION
2)PEEK SHAPE
| Is This Answer Correct ? | 12 Yes | 3 No |
Question { 8797 }
wat is reverse phase in hplc
Answer
THESE ARE (1)NORMAL PHASE
(2)REVERSE PHASE
1)NORMAL PHASE:-POLAR STATIONARY PHASE
NON POLAR MOBILE PHASE
2)REVERSE PHASE:-NON POLAR STATIONARY PHASE
POLAR MOBILE PHASE
| Is This Answer Correct ? | 9 Yes | 2 No |
Question { Claris Lifesciences, 13839 }
why water factor is near about 5.0 in kf titration?
Answer
| Is This Answer Correct ? | 7 Yes | 15 No |
Retention time & Relative Retention time Definition &
between difference?
How to Calculate response factor(RF) & relative response
factor(RRF)?
Answer
but rrt is identified impurities purpose
rt*rrt-impurities rt is identified
| Is This Answer Correct ? | 11 Yes | 3 No |
Question { MSN Pharma, 10968 }
why are using toluene in uv calibraion in resolution
performance
Answer
| Is This Answer Correct ? | 19 Yes | 1 No |
