Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

Dishman,

980

why we use polystyrene film for ftir calibration?

Rakshit Drugs,

4 12090

WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

GVK,

1453




why do we adjusted ph in the mobilphase

Cipla, Reddy Labs, Dr Reddys,

9 16823

How to develop the method when we have very low amount of impurity?

2 5697

If we have 120 minutes run time method for HPLC and you wan to decrease the Run time so what should you do??

6 8843

Wath is the differenc between two column HPLC wich have the samme support , lenth , pore size, etc.. But different name .for exemple : Spherisorb / lichrosorb

NDA,

2 5326

WHAT IS PVT TEST IN DISSOLUTION TEST , WHAT IS PVT SIGNIFICANCE AND HOW IT IS PERFORMED ?

1 5319






1129

How you will select column for HPLC development depends on nature of compound and how it will work explain in brief?

3 7099

What is the role of SO2,I2, Methanolic hydroxide and any base in Karlficher titration

Medley Pharmaceuticals,

2 6201

The boiling point of 1,3 butadiene is -4.4 DC & the boiling point of Pentane is 36.1 DC. Then how come Pentane elute before 1,3 BD in GC analysis?

1 3277

What is Arsenic Test?

Flamingo Pharmaceuticals,

1287

What is the difference between Optical rotation and Spcefic optical rotation

IPCA, Matrix,

2 8928

why we use sodium salicylate in uv light calibration at TLC chamber

Lee Pharma, Aurobindo,

1 5267


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Un-Answered Questions { Analytical Chemistry }

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

764


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1248


What is stray light in uv what are units for stray light

331


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

980


EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1415






In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1597


how to select short coloum and long coloumn for new molecule

1115


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

2197


mahagenco syllabus for the post of chemist

4986


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2173


explain 5 components of gas chromatography ?

748


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?

1012


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 ?

1238


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

808


how will you do the prep for unstable componds?

738