What is the difference between purge septum flow and column flow in gas chromatography?
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how to prepare working standard in our laboratory aganist reference standard ?
4 Answers Merit Biolabs, Unichem,
In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?
I have 1 gram of Diphenylamine and want to make a 10,000 or 1000 ppm solution in methanol. How do I make this?
how we can identify the impurity is coming below loq at transfering site?
why 0.02% solution toluene &noHexane using in uv calibration?
1 Answers Graviti Pharmaceuticals, Orbit Pharma, Ranbaxy, Vimta Labs,
In Dissolution Test why limit is define Q+5% what is the role of +5%.
why KF factor is between 4.5 to 7.5 mg/ml ? why ? why sometime pyridine is used in analysis like in raw material solvent like acetone etc?
11 Answers Aurobindo, GVK, Sohan Healthcare,
in gas chromatography what is the difference between gas flow rate and average linear velocity ?
why kbr is used for pellet preparation in ir spectroscopy, give the reasons? why kbr shows zero dipole moment?
what is the general mechanism of high performance liqiud chromatography?
7 Answers Ajanta Pharma, Amneal Pharmaceuticals,
why the same column give different retention time in hplc?
why 0.005 M sulphuric acid is used to calbrate spectrophotometer and why caffiene is used for calibrating hplc
2 Answers GVK, Torrent Pharma,