Answer Posted / vani

To determine the spectrum of mixture of compounds by using
fourier mathematical relations & attached with competer
device

We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

1907

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is it nessesary to do solution stability for 7 days?

776

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In IR spectra, generally a molecule vibrates without apply emr or ir light?

1981

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WHY pKa value is more important than pH value of the mobile phase in HPLC?

1769

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in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

837

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How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

734

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In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

3129

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In Assy by potentio metry titration method how select MET U ,DET U, SET U,

2172

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how many types of balance calibration test?

2301

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For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

4074

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What is the difference between spectro meter and spectro photo meter?

11515

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

7597

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Related substance method equivalency on control sample or spiked sample?

771

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What is importance of pH in the Heavy metal test and How it effect on the test results?

2284

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What should be the level/ Percentage of Arsenic in Arsenic free zinc.

2233

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