Answer Posted / praveen kumar (ipca_ranu)

Mass balance correlates the measured loss of a parent drug to the measured increase in the amount of degradation products. It is a good quality control check on analytical methods to show that all degradation products

What is dose dumping? why require to do?

1040

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What is mean by PDR?

1025

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why xterra column require to use at higher ph?

966

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How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

2436

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how to calculate elemental impurities?

1083

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please explain about aluminium hydroxide assay

1181

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for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

6141

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Why sodium hydroxide used for maintain pH of phosphate buffer

2481

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which situation gc hs and gc als require to use?

838

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in which situation ion pair require to use?

876

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AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

2111

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in which situation ion pair agent require to use?

796

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How can the GC or HPLC method is selected to determine the impurity profile in drug product?

7674

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How to set analytical specification for combination products?

869

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Related substance method equivalency on control sample or spiked sample?

820

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