how will you do the prep for unstable componds?

727

WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1239

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 ?

1228

how you determine moist.of NaOH sol or NaOH flacks

1111

IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1283

what is partion and column chromatography

1101

In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1985

1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

331

what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

753

I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2163

In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1506

what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

7345

How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1095

why we should take dst factor for below 1%moisture samples

1484

What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

6223