Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

IF HPLC CALIBRATION FAILED THEN WHAT YOU DO

6 23461

Optical Rotation*0.9477*100*200] Assay Of dextrose= ________________________________ 99.8* 200 why Factor=0.9477

Claris Lifesciences, Inven Pharmaceuticals, Levo,

1 9433

How you will select the runtime in HPLC for a drug in method development.

GVK, Lesanto Laboratories, Aurobindo,

6 14001




If compound Pka is 5 then which buffer you will select ?

GVK, Avra,

5 10866

what is the difference between BDS and ODS Columens and both are same or not

Micro Labs, Vasava Engineering Private Limited, IPQA, Intas,

2 54007

difference between HPLC & LC-MS

Lambda,

9 34907

difference between record & document ?

4 9861

in what basis wavelength will select for a compound at initial method development trials

Matrix,

4 8294




How did you conclude that when stressing a compond, all degradation products have eluted in chromatogram?

Matrix,

7 6449

how to prepare working standard in our laboratory aganist reference standard ?

Unichem, Merit Biolabs,

4 19188

What is boiling point ? & Explain.

2 5524

What is Delay & Dead Volume

2 11137

In method developement or in any analysis if we use small length column for analysis what happen then ? why ?

3 4518

difference between IR& FTIR

Cadila,

4 11548

1 % solution is equal to how much ppm

32 394843


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Un-Answered Questions { Analytical Chemistry }

what is third integration

634


what is %labelled amount in content uniformity of dosage unit and its calculation?

3467


My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

115


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

857


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

755






why disodium tartarate used in karl-fischer instrument ?.

607


Why irmoisture balance is used for corrugated box moisture testing

967


How can we determine Moisture content of HI?

969


What is the meaning of Base deactivated vials

923


Dear sir, This is R.Kadambavadani working in a pharma industry. while doing RS analysis of ibuprofen API, unknown peak eluting some times in the 0.6 Min RT. Kindly send me what is the exact reason behind that. also am using ACN the mobile phase.

212


Can we interpret accuracy from linearity in method validation?

669


using gradient pressure in gas chromatography are not ?using gradient pressure why

2048


why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

289


in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

837


in dissolution why pool sample needed? in which type of drug pool sample need?

1747