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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?

Graviti Pharmaceuticals, Vimta Labs,

2 3350

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

Cadila, Vimta Labs,

5 15675

Why Na lamp is used in polarimeter?

Vimta Labs,

5 12323

why is salt andv ice used in liquifyiny SO2

Graviti Pharmaceuticals,

1 3288

What is pooled sample in Dissolution

Graviti Pharmaceuticals, Lupin,

2 18303

cefoperozone and sulbactam inj. hplc test method

Graviti Pharmaceuticals,

1557

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

Graviti Pharmaceuticals,

6 15277

what is Fourier Transform

Graviti Pharmaceuticals, GVK,

3 6969

What is descriminatory disolution medium ?

Cipla, Graviti Pharmaceuticals,

3 7216

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

Divis Laboratories, Ranbaxy,

4 12261

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

Divis Laboratories, Graviti Pharmaceuticals,

1 9615

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

6 20754

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

Divis Laboratories,

4 10947

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

Divis Laboratories,

1 7022

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

Biocon, Cipla,

5 13306


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Un-Answered Questions { Analytical Chemistry }

Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

1252


Tell me about analytical method validation in QC

3347


What is gelatinization?

743


if you have given a blank water how you analyse by general analytical techniques?

1023


Why six unit used for precision?

199






How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1401


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

7660


what is definition of validation? which components are followed give detail?

1229


How do we fix the sample concentaryion in hplc method development. What is the basis?

184


why we should take dst factor for below 1%moisture samples

1696


what is the origin to prepare standard operating procedure

1290


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

1968


How can we calculate offset value pH measurment

528


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

625


How do we fix the sample concentaryion in hplc method development?

162