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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 6532

how v can identify functional groups by wet techniques?

2 3216

What is the difference in OVI and Residual solvents?

Discovery Intermediates,

3 11791

what is the method of UV cabinet CALIBRTION

2 12253

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

Sharp,

1480

why IR graph or spectra comes down ? Any reason

4 14004

what is partion and column chromatography

Emcure,

1417

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

Emmennar, Neuland,

3 12445

How to establish pKa for a new API molecule ?

Neuland, Sun Pharma,

2 9453

why we are adjusting the ph in buffer solution preparation

2 10504

what is the film thickness in ftir

8 10272

what is the principle of assay of sodium nitrite?

2 8494

why required specificity in valdation

3 6428

why we are analyzing purity on HPLC why not in gc

Aurobindo, Reddy Labs,

3 11868

whate is difference between calibration and validation

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

11 44668


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Un-Answered Questions { Analytical Chemistry }

How can I develope method of dissolution by HPLC OR UV

1456


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

7456


what is the principle involved in turbidometry and nephelometry ?

3148


what is the structure of DOWEX-50

4396


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2618






Explain the relations between number of carbon atoms in alkanes and retention time ?

1131


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

200


What is rs test why we are performing rs test?

393


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

6152


what is turbidimetric titration?Give 2 examples.

1514


some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1578


Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

1639


Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

711


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

1337


What is aggregate and fragments in SEC?

1133