Answer Posted / srinivas

C18

What is the principle of Thermal conductivity detector and FID?

2734

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Identify problem faced when mass spectroscopy is used with HPLC system ?

1878

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How to fix the sample conc. in Related substances test by HPLC?

1101

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What is the diference between residual solvents and organic volatile matter

2059

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what is the extinction coefficient for Indomethacin or at 319nm wave length.

4074

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What is similarity factor?

1211

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Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

2709

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why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

2271

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what is mean by 40 in the dissolution basket mesh size?

790

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why are measure gas flow " ml " in Gas chromatography

1661

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What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2689

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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.

2224

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What if impurity area in control sample coming more as compared to LOQ level of impurity ?

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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

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i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

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