Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

i set electrode to 7 buffer than i used it to check 4 buffer and 10 buffer if the results are not as expected than is it better to set the buffer again to 4 buffer or is there any other method available please let me know ...

Glochem,

2 4391

How much is the standard area for glc analysis

853

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

DRL,

1127




what type of compounds do we see lod @ wat type compounds do we see m.c

Orchid,

3 5607

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

Ajanta,

1 5245

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

Cipla, Rampex Labs,

2323

What the difference in loss on drying and residue on ignition

2 19642

Why irmoisture balance is used for corrugated box moisture testing

Leiutis, Lupin,

967




why we are used 4,7,9,2 buffers for the ph calibration

Aurobindo, Enaltec Labs,

4 13965

In case of HPLC coloums what is the difference Between C8 & C18 coloums & how can we select difference type of coloums like Inertial ODS , Hypersil BDS , ODS etc.?

MSN Pharma,

4 23751

Is sonication essential in solubility testing of a drug substance?

Aurobindo,

6 10207

what is different between volumetric solution and general solution

1 13012

what is primary solution and secondary solution

2 5027

what is RI detector Cut-off Value

Mylan,

1 7104

In Related Substances Test how we can reside the limit of impurity ?

MSN Pharma,

2 8098


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Un-Answered Questions { Analytical Chemistry }

How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1134


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1286


cefoperozone and sulbactam inj. hplc test method

1201


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1370


pharma industries oriented

749






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

626


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

536


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

224


what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

1973


can i use hplc detector to uplc and why?

859


Which is the highly polar and highly non polar column in HPLC?

695


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

2485


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

1005


what is weight veriation in pharma industry ? plz explain me

958


why octanol used to determine the partition coefficient ?

896