Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

what is dwell volume in HPLC?

Aurobindo, Cadila, Strides, SUN, Sun Pharma,

2 7952

what does pH stand for?

Orchid,

4 8507

Definition of beers_ lamberts law

Aarti Industries, Agio Pharmaceuticals, Emcure, Supriya Lifescience,

4 8384

Why monograph of hplc coming upperside of drift but in IR monograph coming in drift side?

1 4195

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

Zim Laboratories,

2350

Why the ph limit (1_14) Is used?

Cipla,

3 8388

What is cut off value of solvent used in hplc

Pfizer,

1 6608

How to calculate mass balance in RS after degradation

Reddy Labs,

1 6107

if out of two set of results of moisture analysis first 1 is passing, second one is failing, is it oos ? or vice a versa first 1 is failing and second one is passing. for information mean value to be reported and in mean value the substance is ppassing, is it oos or normaal mean value to be considered?

JBCPL,

1 3692

Can we interpret accuracy from linearity in method validation?

Dr Reddys, Lupin,

1 3050

What is aggregate and fragments in SEC?

2119

how pyridine can be analysed other than GC?

1 4340

What is the calibration of uv process and preparation

Aurobindo,

2001

How to prepare 1000ppm methylene blue solution

2 21337

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

College School Exams Tests,

1888

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Un-Answered Questions { Analytical Chemistry }

how require to select dissolution media? what is discrimination?

798

in api coa contains only process impurities and in product coa contains degradation impurities?

707

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

5245

CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

1214

how you start the solubility study?

835

What is the principle of Thermal conductivity detector and FID?

2737

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

1607

how many types of balance calibration test?

2309

why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

2307

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

1149

how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

2314

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

1888

is it nessesary to do solution stability for 7 days?

786

what is the difference between potentiometric titration and karl fischer titration?

3198

Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

1475

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