what is the difference between capillary and glass column in GC1 5123
what is basc principle of the HPLC,IR,UV AND GC? what is difference between diffusion spectra and transmision spectra in IR?1 17137
plz tall me that any pharmacopeia and guideline is par meted to use 1.68,4.01,7.00,9.00,12.45 buffer for ph meter calibration1 1190
In pharmaceuticals formulation OOS applicable in Raw Material(which is not manufacturing in the company. and purchase by approved vendor)).Why?1 5399
On which pharmacopoeia basis we can calibrate instruments like HPLC,GC,UV,DISSO,IR etc...9 15368
How to make up 100ml of a solution cintaining compound A at 95µg/ml and compound B at30µg/ml for an HPLC reference standard.2 3804
How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain1055
Why Ethanol is Used for Standardization of GC Head space?
How we can determine water content in piperazine
What is aggregate and fragments in SEC?
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me
what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?
A ha tc is actual defination of retention time?
Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?
My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards
Which is the highly polar and highly non polar column in HPLC?
iam usig ph buffers merk. manually how to prepare ?
mode of absorption in alimentary canal?
what is difference between zero air gas and o2 gas
What are the primary considerations in extractables and Leachables ?