in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?
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how many types of balance calibration test?
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which pharmacopeoia mentions that caffiene is used as a standard for HPLC calibration? which other standardscan be used for the same?
only one end point is possible for citric acid and we get 2 end points for di acid why?
In lcms analysis some times we get sodium and potassium adducts. if the compound is havine sodium ions how can we confirm wether sodium is from sample or it is a adduct?
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In HPLC when we use Isocratic method, Gradient method in hplc?
wat is reverse phase in hplc
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What are the primary standards?