Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is lod and loq

3 7321

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 ?

Wockhardt,

2087

What is the b/W dead volume and dwell volume ?

2 10744




why r u using hplc grade solvents

4 8288

Why do we use sodium salicylate for Calibration TLC Cabinet U.V Lamps

Matrix, Spar Labs,

2 13949

How do you show that equal quanitities of two isomers provide the same response using a PDA

1 3701

what is GLP? Which industries it requried?

GVK, Aurobindo, AXIS Clinicals,

1 9803

How can we separate Urea & semicarbazide in single HPLC method ?

2 4343




What is the calibration procedure for Malvern MS2000 particle size analyzer and acceptance criteria?

Reddy Labs,

2 2467

why we can use only 4 and 7 and 9 buffers in pH calibration

Cipla, Chola,

1 2444

How to do regeneration of Metacarb Pb plus column?

1249

we calibrate HPLC once in 6 months while iam doing calibration i came to know that calibration was failed. then how can i justify that the samples analyzed on the system during this 6 months was wright? how can i forward in to the next step for those batches?

5 8161

What is the solvent/material used to balance spirit level in analytical balance?

Glenmark, MMC Health Care,

3 8436

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 4113

why do we use around only 60 mg of K2cr2o7 in the UV calibration -control of absorbance test?

Reddy Labs,

3 9605


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Un-Answered Questions { Analytical Chemistry }

how can give the expiry period and restadardisation of volumetric solution

1282


could negative ions be produced by bombardment process in mass spectrometry?

177


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

789


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

1821


How to choose the which salt is suitable for mobilephase

1653






about method developement in hplc

375


In performance Check of GC Why Hexadecane Peak is Considered 

1752


A ha tc is actual defination of retention time?

207


For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2414


In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

709


how can I make the copper get white bye any salt or acit?

967


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

1444


How much is the standard area for glc analysis

913


what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.

684


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1281