Answer Posted / srikanth

above answer is perfect and also,,,....

Normal Phase: separates analytes on the basis of their
affinity for a polar stationary surface such as silica.

Reversed Phase: separates on the basis hydrophobic
interacertions, which originates from the high symmetry in
the dipolar water structure

What is similarity factor and its use in api strength?

1249

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Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2289

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HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

2187

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

1101

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analytical method validation require to with respect to release specification or shelf life specification?

733

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What is the difference between chromatographic purity and related substances?

1296

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Why we select scan range from higer wavelength to lower wavelength in uv visible spectroscopy and ftir spectroscopy ? .

853

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why are measure gas flow " ml " in Gas chromatography

1596

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how will you do the prep for unstable componds?

1973

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what is partion and column chromatography

2300

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why we use a particular hplc column for a particular compound give reasons?please

2684

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Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

2897

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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.

2170

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How doing qbd practically?

916

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identification is for unknown? qualification for known? reporting for LOQ?

665

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