Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why phepolphthalene giving pink color when we titrate against to NaOH Solution ,giving colrless titrating aginsiting with acids?

Vimta Labs, Graviti Pharmaceuticals,

2 2258

why ph electrode is storing in KCL solution?Why the pH max is 14.0?

Cadila, Vimta Labs,

5 13246

Why Na lamp is used in polarimeter?

Vimta Labs,

5 10689




why is salt andv ice used in liquifyiny SO2

Graviti Pharmaceuticals,

1 2754

What is pooled sample in Dissolution

Lupin, Graviti Pharmaceuticals,

2 14809

cefoperozone and sulbactam inj. hplc test method

Graviti Pharmaceuticals,

1203

how peak can be sharp in hplc when it is come flat

Graviti Pharmaceuticals,

6 12999

what is Fourier Transform

Graviti Pharmaceuticals,

3 5857




What is descriminatory disolution medium ?

Cipla, Graviti Pharmaceuticals,

3 6150

what is the difference between loss on drying in ordinary oven technique and vacuum oven technique

Ranbaxy, Divis Laboratories,

4 10771

what is the difference between the Purity and Potency of drug substance

Divis Laboratories, Graviti Pharmaceuticals,

1 8363

what is the difference between LOSS ON DRYING IN ORDINARY OVEN TECHNIQUE AND VACUUM OVEN TECHNIQUE

6 17135

why we are using only lead standard solution for Heavy metals test? what is the purpose of this?

Divis Laboratories,

4 8927

what is the difference between the ordinary loss on drying technique and vacuum oven technique?

Divis Laboratories,

1 5939

what is the difference between gc& hplc. why we r not calculating purity by gc for final products

Biocon, Cipla,

5 11629


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Un-Answered Questions { Analytical Chemistry }

What is diffrence between extractable volume and deliverable volume? Answer pls

501


how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

876


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

1890


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

653


How will u perform degradation study in detectors other thann PDA in HPLC Methodology

1164






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

612


wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language

991


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

1190


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1584


How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

237


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

1175


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?

225


How we can determine water content in piperazine

811


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

1748


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

158