for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol1 3713
we run the same sample in same method in different flow rates in HPLC,any changes in sample analysis?2 4927
For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?2539
For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?937
if the flow rate is increases then any changes in retention time in hplc1 5528
what is the limit of Correlation for IR test compare to the standard and test3 5999
IS THERE ANYWHERE MENTION THAT THE RE PROCESS BATCH REQUIRE TO KEPT STABILITY STYDY2 3792
stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?2 3752
how to correct peak when peak comes broader in shape? How to do calibration of HPLC?2 5474
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 are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio
What is column in chromatography?
Tell me about analytical method validation in QC
How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample
what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?
what is partion and column chromatography
what is the difference between potentiometric titration and karl fischer titration?
How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?
In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?
which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc
what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?
please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development
could negative ions be produced by bombardment process in mass spectrometry?