Answer Posted / chennu

polystyrine film emits all functional groups
so we used.

how to get accurate result for Residue on evaporation in purified water

1698

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what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3727

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what are the standard methods for HPLC?

2832

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in hplc chromatogram started from left to right and in uv spectrum started from left to right

1016

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how to develop the icp ms method? Application of icp ms?

850

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how you start the solubility study?

864

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how require to set assay concentration for standard and sample?

975

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Why perchloric acid used for potentiometric titration

2736

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1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

1900

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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.

2267

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why octanol used to determine the partition coefficient ?

2499

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If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

910

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calibrtion procedue of LC-MS

2762

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What is the principle of Thermal conductivity detector and FID?

2780

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what is mean by peak intigrity?

1028

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