Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is lod and loq

3 10138

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,

3174

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

2 13403

why r u using hplc grade solvents

4 11345

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

Matrix, Spar Labs,

3 22526

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

1 5312

what is GLP? Which industries it requried?

Aurobindo, AXIS Clinicals, GVK,

1 11607

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

2 6214

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

Reddy Labs,

2 4987

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

Chola, Cipla,

1 4452

How to do regeneration of Metacarb Pb plus column?

2072

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 11085

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

Glenmark, MMC Health Care,

5 11827

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 5589

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

Reddy Labs,

3 12942


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Un-Answered Questions { Analytical Chemistry }

can i use hplc detector to uplc and why?

1800


Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1155


How to know the estimated LOQ concentration in ppm

723


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

2586


how much mass should be there in volumetric flask while in preparation of sample for assay? 

2045






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?

1701


from where i get mortar pastle for glass bottle crush? it's required for testing of it?

1726


CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

692


In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

451


Please give idea about method development for cleaning method and how maco level establish

264


why cone formation during dissolution?

309


why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

2330


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

314


why we are using benzene, anyline in acetic anhdride assay titration method?

1569


what is mean by nitrosamine impurities?

533