Answer Posted / ankit chaudhary

Least count is the unit count in which balance gives readings for example if 100 gm balance gives readings of 0.001 variation ,so its least count can be considered as 0.001 mg

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

823

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How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1767

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2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

2212

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why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

1704

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Difference between hlaf and rlaf

2103

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

2277

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Qc interview questions

1734

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what is procedure of actual procedure for registration of drug?

2008

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What is the use of tlc and hplc? And when and where use?

1147

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For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

1902

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Ph meter can show more than 14 ph reading? Why ph range in between 1 to 14 only?

729

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What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2676

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what is the structure of DOWEX-50

5503

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How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

4254

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function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

2657

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