What is Specificity ?

8 Answers   Dr Reddys,

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

0 Answers  

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why phenolpthalin gives pink colour when we titrate aganist sodium hydroxcide & phenolpthalin gives colourless titrate aganist hydrochlric acid which is un burate

1 Answers  

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why we multiply 1000 in the determination of kf factor ?

3 Answers   Stellence Pharm Science,

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how to calibrate hplc & gc

0 Answers   Cipla,

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What is the difference between Optical rotation and Spcefic optical rotation

2 Answers   IPCA, Matrix,

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what is separation techniques.

1 Answers   Glenmark,

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Why only lead standard solution is uesd to perform heavy metal test.

2 Answers   Reddy Labs,

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Which column is more polar, C8 or C18?

6 Answers   Cipla, Glenmark, Laurus, Torrent Power,

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In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?

1 Answers  

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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.

0 Answers  

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Any molecule is filing for ANDA purpose, what are the dissolution requirements / specifications needed ?

1 Answers   IPCA,

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