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in stress study if your api not soluble in hcl naoh h2o2 then what require to do?
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what is the concept for adjustment of pH in HPLC buffer solution ? a. Common ion effect b. Counter ion effect and explain me, how we adapt this principles & what is the role of these principles in our method
1 Answers Apex, Pentagon Labs,
what is LC - MS ? What its wide use in cro/pharmaceutical Industry
A new drug substance found fail to meet specification for an unknown Impurity during stability study(Specific change),how would further proceed?
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In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?
How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.
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 ?
What is difference between assay by Hplc and uv
2 Answers Aizant, Fredun Pharmaceuticals, Hetero, Marksans Pharma,
Which parameter require to do for analytical method equivalency?
Explain in detail what are the procedure and calculations involved for accuracy (%Recovery)in method validation?
how require to select dissolution media? what is discrimination?
what is the difference between polarimeter lamp and ir lamp
Organic Chemistry 
