Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Plz explain the formula in uv calibration =Absorbance of the sample ( x ) x 10 x 1000/Weight of potassium dichromate taken in mg

1 6179

how v can identify functional groups by wet techniques?

2 2733

What is the difference in OVI and Residual solvents?

Discovery Intermediates,

3 10990




what is the method of UV cabinet CALIBRTION

2 11508

WHAT IS THE USE OF STARTER ?????????

Sharp,

1317

why IR graph or spectra comes down ? Any reason

4 13183

what is partion and column chromatography

Emcure,

1248

What is the difference between the optics of UV and PDA Detectors ?

Neuland, Emmennar,

3 11689




How to establish pKa for a new API molecule ?

Neuland, Sun Pharma,

2 8829

why we are adjusting the ph in buffer solution preparation

2 9808

what is the film thickness in ftir

8 9411

what is the principle of assay of sodium nitrite?

2 8073

why required specificity in valdation

3 5784

why we are analyzing purity on HPLC why not in gc

Reddy Labs, Aurobindo,

3 11322

whate is difference between calibration and validation

Ranbaxy, Zydus Cadila, Cipla, Alkem Labs, Torrent Pharma,

11 42953


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Un-Answered Questions { Analytical Chemistry }

what type of questions asked on analytical balance and also give answers................all pharma companies?

7745


pharma industries oriented

1066


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

1181


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1486


In the gas chromatography what is used carrier gas and make up gas?

104






what is procedure of actual procedure for registration of drug?

860


how the compound separate in coulunm,explain

1281


if you have given a blank water how you analyse by general analytical techniques?

928


why we should take dst factor for below 1%moisture samples

1621


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2325


How you develop a method in HPLC?

1514


what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

3368


As per ICH related substances stability trend limit from initial to shelf life

2027


How do we fix the sample concentaryion in hplc method development?

83


Why sodium hydroxide used for maintain pH of phosphate buffer

1197