What is the difference between potentiometry assay and HPLc assay?2 11359
how std. of znso41 2623
In GC and HPLC ,how we can decide which of following method will be suitable or use for quantitation of chromatogram at the time of method development. 1.Area Normalisation 2.External standard method 3.Internal standard method
what is mean by profiling of dissolution1 5208
How decided 10 ppm standard solution in Swab, rinse method.?1 5587
WHAT IS THE LIQUID PHASE IN DB-624 COLUMN IN GCHS3 5761
In capadity factor formula is K'= (RT of main compound/RT of first eluted peak)-1 in this formula what is 11 4523
In HPLC (Waters) software Empower1,2 &3 what is the updation for each version
hii, i'm had a sample of 1L that gone through extraction & evaporation. i used 0.5ml of methanol for reconstitution before injecting the sample to HPLC. i made a calibration curve using a standard solution but now i'm confused about how to display the concentration i got from the sample. for ex. i got 0.2ug/ml how i'm gonna explane this is for the 1L ? please help .. i'll really appreciate it thanks1 2117
Dear Sir, This is Thirunavukkarasu am working in Ordain Health Care AR&D, Am Having one problem While doing method development my question Metadoxine and Pyridoxine same chemical nature and structural activity i tried lot of methods but Analyte eluted same Retantion time i cant separate both peaks. solubility, pH both are same only only difference melting point metadoxine 210 C Pyridoxine 102 C please do the help needful for me5 5107
some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?1074
What is the difference between known and unknown impurities?
what type of question will ask in the interview of lab chemist.
what is the difference between potentiometric titration and karl fischer titration?
Tell me about analytical method validation in QC
How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain
What are the primary considerations in extractables and Leachables ?
What is column in chromatography?
what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?
how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,
why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space
if you have given a blank water how you analyse by general analytical techniques?
HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.
why we use a particular hplc column for a particular compound give reasons?please
In performance Check of GC Why Hexadecane Peak is Considered
what is weight veriation in pharma industry ? plz explain me