Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is lod and loq

3 7154

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,

2029

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

2 10599




why r u using hplc grade solvents

4 8185

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

Matrix, Spar Labs,

1 13697

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

1 3634

what is GLP? Which industries it requried?

GVK, Aurobindo, AXIS Clinicals,

1 9700

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

2 4287




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

Reddy Labs,

2 2345

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

Cipla, Chola,

1 2324

How to do regeneration of Metacarb Pb plus column?

1216

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 8034

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

Glenmark, MMC Health Care,

3 8302

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 4038

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

Reddy Labs,

3 9320


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Un-Answered Questions { Analytical Chemistry }

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

1317


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?

254


What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

5125


why we are using hexane in calibration of number of drop per mL

183


A ha tc is actual defination of retention time?

178






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

2076


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

4758


calibrtion procedue of LC-MS

1207


how you determine moist.of NaOH sol or NaOH flacks

953


How to define samples weight in moisture content

81


i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

1373


What is third generation HPLC Columns?

637


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

635


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2430


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

906