i set electrode to 7 buffer than i used it to check 4 buffer and 10 buffer if the results are not as expected than is it better to set the buffer again to 4 buffer or is there any other method available please let me know ...2 4292
function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?
How can the GC or HPLC method is selected to determine the impurity profile in drug product?1 5138
How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.2250
What the difference in loss on drying and residue on ignition2 18819
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.?4 22733
what is different between volumetric solution and general solution1 12270
what is primary solution and secondary solution2 4871
What is importance of pH in the Heavy metal test and How it effect on the test results?
How to start the dissolution development for unknown tab?
calibrtion procedue of LC-MS
why 6 tablets use for dissolution
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
what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.
In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.
what type of questions asked on analytical balance and also give answers................all pharma companies?
why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space
about method developement in hplc
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 THE USE OF STARTER ?????????
Which is the highly polar and highly non polar column in HPLC?
What should be the level/ Percentage of Arsenic in Arsenic free zinc.
What is method validation in quality control