What is the difference between potentiometry assay and HPLc assay?2 11631
how std. of znso41 2672
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 5318
How decided 10 ppm standard solution in Swab, rinse method.?1 5714
WHAT IS THE LIQUID PHASE IN DB-624 COLUMN IN GCHS3 5867
In capadity factor formula is K'= (RT of main compound/RT of first eluted peak)-1 in this formula what is 11 4595
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 2180
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 5212
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 ?1106
How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?
USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...
2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
How can we determine Moisture content of HI?
How can I develope method of dissolution by HPLC OR UV
how to select short coloum and long coloumn for new molecule
What is the purpose of octyl silane columns?
what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?
How can we calculate offset value pH measurment
What are modes of quantification in related substances
What is the difference between BD
Why irmoisture balance is used for corrugated box moisture testing
using gradient pressure in gas chromatography are not ?using gradient pressure why
what is weight veriation in pharma industry ? plz explain me
In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?