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 ?
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what is the working priniciple of ph, what are parts in ph meter
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why disodium tartarate used in karl-fischer instrument ?.
How to set specification of assay, fisdolution and related substances?
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what is the defination of accuracy & presicion?
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how many types of Proceing methods?
If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately