Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what are peak purity,peak purity index,peak thresold

2 11373

1)why use benzophenon,uracil in hplc calibration. 2)why use sucrose in polarimeter calibration. 3)what is S/N ratio, noise and drift in hplc 4)how we can find lod and loq in method validation

1 10279

What is (Q) point dissolution?

Cipla, Macleods,

6 17884




Why we are using K2Cr2O7 for control of absorbance in UV?

2 9616

1 why polyesterene film used for ftir calibration ? 2 why k2cr2o7 is used for control of abs in uv ? 3 why holmium oxide used for control of wavelength in uv

3 8956

what is the principal of malvern particle sizer & its used in pharma industry

3 5437

what is the difference between system precision and method precision?

Teva Pharmaceuticals,

3 20277

In lcms analysis some times we get sodium and potassium adducts. if the compound is havine sodium ions how can we confirm wether sodium is from sample or it is a adduct?

Teva Pharmaceuticals,

2 4628




what is difference between moisture contents and water contents ?

Cipla, Hetero, USM,

12 43088

In GC, What does 'Column condensation test' mean by?

Reddy Labs,

2 7600

same sample on two preapration gives differnt result during hplc analysis

3 4690

what is titrent,& titrate

Graviti Pharmaceuticals,

2 8909

Why we are using a Kf Factor range 4 to 6

7 31660

What is difference between Chromatographic purity and Related substances analysis?

3 16696

Why we are using the methanol in Kf titration?

Reddy Labs,

6 14531


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Un-Answered Questions { Analytical Chemistry }

why 6 tablets use for dissolution

1807


what is DIPE limit in residual solvent?

447


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

1179


what is partion and column chromatography

1000


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

522






what is difference between zero air gas and o2 gas

5727


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?

5579


How can I develope method of dissolution by HPLC OR UV

923


What is the difference between known and unknown impurities?

191


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

795


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1089


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

204


what is separation techniques.

1301


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

827


How to start the dissolution development for unknown tab?

253