how much mass should be there in volumetric flask while in preparation of sample for assay?
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What is the principle of Thermal conductivity detector and FID?
in hplc chromatogram started from left to right and in uv spectrum started from left to right
What is GF254 means in TLC plate?
when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.
What is the purpose of performing dissolution test on routine basis?
what is the difference betwen the analytical column & peparative column?
How you will select the runtime in HPLC for a drug in method development.
6 Answers Aurobindo, GVK, Lesanto Laboratories,
How do you increase the number of theoretical plates?
Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?
effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?
If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?
In UV calibration we use Holmium perchlorate solution made in 1.4M perchloric acid The question is that 1.4 M perchloric acid we make is it in water or glacial acetic acid?