Answer / vivek vaidya

1-2 PPM

In Analytical method development related substance method when did follow w/w method when did follow area normalisation method

2 Answers   Dr Reddys, Sun Pharma,

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

0 Answers   College School Exams Tests,

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we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

0 Answers   Cipla,

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What is FFA, PV, and PAV value in oil.

1 Answers   Nestle,

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same sample on two preapration gives differnt result during hplc analysis

3 Answers  

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what should be the precision during technology transfer?

3 Answers   Glenmark,

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mahagenco syllabus for the post of chemist

0 Answers   MahaGenco, Unimarck Pharma,

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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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in loss on drying Why follows on constant weight not more than 0.5 mg, any region

1 Answers   Biocon,

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Which parameters require to do in tech transfer?

0 Answers  

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is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

0 Answers   Aarti Drugs,

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Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

2 Answers   Vardhman,

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