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WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY
Analytical Chemistry 2565why kbr is used for pellet preparation in ir spectroscopy, give the reasons? why kbr shows zero dipole moment?
6 Analytical Chemistry 18202
Question { Amneal Pharmaceuticals, 29264 }
what is the defination of accuracy & presicion?
Answer
find,
preceesion means repeatability
| Is This Answer Correct ? | 5 Yes | 0 No |
How are PDA Detector work in HPLC
Answer
DETECTOR,TO FIND OUT THE RETENTION TIME OF ANALYTE PEAK AT
MULTIPLE WAVE LENTH.EX CAFEEN ITS SHOWS MAXIMUM ABSORBANCE
IN 203-207NM,276-281, AND MINIMUM ABSORBANCE 243-247 NM
| Is This Answer Correct ? | 2 Yes | 0 No |
Question { 22771 }
which brands HPLC COLUMN available in market
Answer
type,cyno type columns, ihis are all the non polar
stationary columns
| Is This Answer Correct ? | 2 Yes | 0 No |
Question { 36471 }
IF HPLC CALIBRATION FAILED THEN WHAT YOU DO
Answer
or not, when compared to reference standard.
hplc calibration fail we can raise the quality impacting
insident that means which effect on the results of your
sample.
| Is This Answer Correct ? | 5 Yes | 6 No |
Question { 21709 }
what is the diff betwen calibration and system suitability?
Answer
or not, when compared to reference standard based on some
parameters. if it fails it is a quality impacting insident.
system suitability means it is use full for analyst,
reagents, columns. these are intended use.
| Is This Answer Correct ? | 0 Yes | 0 No |
what is reverse phase chromarography&normal phase
chromatography
Answer
mp is polar ,where as in normal phase chromatography we use
sp polar, and mp is non polar,so most of the industries
follow reverse phase chromatography,because mostly organic
compounds are in polar nature and we reduce the Retention
time
| Is This Answer Correct ? | 2 Yes | 0 No |
Question { 11275 }
what is mean by UOD?
Answer
tablets in any solvent and dissolving the tablets in
solvents,and measure the assay in each tablet. in all
tablets the assay is equal is equal.
| Is This Answer Correct ? | 4 Yes | 3 No |
Question { 11000 }
is there any exact definition for Theoritical plates ?
chennu srinivas
Answer
rate of disorption . accepatance cretiera nlt 2500 as per usp.
formula: TR2-TR1/ O.5*TW1-TW2.
TR2= RT OF FIRST PEAK, TR1= RT OF SECOND PEAK,
TW1= PEAK WIDTH OF FIRST PEAK, TW2= PEAK WIDTH OF SECOND PEAK
AS PER USP THIS FORMULA
| Is This Answer Correct ? | 1 Yes | 6 No |
Question { 5458 }
basic of hplc,columns used
Answer
are two types in hplc. normal, reverse phase.
we use only reverse phase because to reduce retention time.
in hplc we use C18,C8,C4,pheno type, cyano type columns in
hplc. carbon chain increses non polarity also increases.
C18 is more non polar than C4
| Is This Answer Correct ? | 4 Yes | 0 No |
Question { 12978 }
Why do we need GC instead of HPLC? or Why do we need HPLC
instead of GC?
Answer
technique less volatile compounds are seperated, column are
made from silica.
in gc compounds are seperate based on partition, high
volatile compounds are seperated, capiilary columns are used
| Is This Answer Correct ? | 2 Yes | 2 No |
Question { Nectar Lifesciences, 10919 }
What is the difference of time between two consecutive injections in HPLC?
Answer
injection, manual injection.
in auto injcection the samples are placed in tray its
having 100 above vials holes, where that saples are placed.
in manual the samples are injected buy syrangy in vials
| Is This Answer Correct ? | 0 Yes | 11 No |
