Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

if v use HELIUM & ARGON instead of NITROGEN as a mobile phase what happen in GC SYSTEM ?

Cipla, Reddy Labs,

5 8312

what is relationship between absorption and transmittance in u.v.?

Orchid,

11 22179

why we are using polystyrene film for calibration of I.R spectroscopy?

Abbott, Intas, Reddy Labs, Andhra Organics, RRR, Veritas, Kemwel, Zydus Cadila,

12 48739




why we cannot analysis below 200nm in u.v?

2 10994

what split ratio in gas chromatography.

Cipla, Glochem,

9 35835

significane of detector wavelength accrucy in calibration of hplc

1 3978

signifcance of detector lenearity in calibration f hplc

3 5297

injection volume accruacy test i calibration of hplc

HLL,

3 11820




verification of wave number why you are use in IR calibration

2 4984

control of resolution in calibration of IR

3 6301

defination of wavelength & wave number

4 9322

what is LC - MS ? What its wide use in cro/pharmaceutical Industry

Ranbaxy,

4 6915

what is difference between IR & FTIR ? how we calibarte both ? I want to know the procedure.

Cadila,

7 81858

which brands HPLC COLUMN available in market

11 13732

calibrtion procedue of LC-MS

GVK, Matrix,

1268


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Un-Answered Questions { Analytical Chemistry }

How much is the standard area for glc analysis

934


what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

2297


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]

1499


What is the purpose of octyl silane columns?

2642


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

467






How to check hplc detecter sensitivity?

233


sop of a uv visible spectrophotometer double beam elico model

4156


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

908


iam usig ph buffers merk. manually how to prepare ?

987


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

727


My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

198


What is the difference between spectro meter and spectro photo meter?

8457


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

301


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1096


why 6 tablets use for dissolution

1875