Answer Posted / m.kiran reddy

Negative peak simply indicate that your mobile phase
absorbs UV light.So use only HPLC grade solvents.Even with
HPLC grade solvents you get the negative peaks you system
might not be working properly.

Regards
M.KIRAN REDDY

For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

2306

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give clarity of linearity and range in method validation

2413

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What is rs test why we are performing rs test?

1851

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how many types of balance calibration test?

2295

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1908

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1635

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780

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1612

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in which situation ion pair require to use?

801

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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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what is turbidimetric titration?Give 2 examples.

2651

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Why sodium hydroxide used for maintain pH of phosphate buffer

2402

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9241

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872

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4254

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