Answer Posted / hiren

First is not column proper installations  
Secound is not proper work syrring
Thred is injector septa so much punching 

if you have given one product then how you determine the impurity in that?

723

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Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

2813

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Principle of single pan analytical balance

5129

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In performance Check of GC Why Hexadecane Peak is Considered 

3023

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why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

9770

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Why perchloric acid used for potentiometric titration

2661

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In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

3467

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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

838

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why octanol used to determine the partition coefficient ?

2436

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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.

2201

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iam usig ph buffers merk. manually how to prepare ?

2257

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IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

2439

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Tell me something about Vitamin A test method by HPLC

2657

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Please give idea about method development for cleaning method and how maco level establish

729

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What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

1888

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