Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the difference between drug product and drug substance?

Apotex,

1 407

What is excipient in drug product?

Lupin,

1 380

What is GF254 means in TLC plate?

1 261




What is zero water in TOC Analysis?

Orchid,

1 214

What is the name of the detector used in TOC?

Lupin,

1 332

What is NPOC method in TOC?

1 308

What is FDA form 482c?

Lupin,

1 344

What are the class-1 residual solvents listed in ICH guidelines?

1 374




What are the concentration limit for class-1 residual solvents in ICH ?

Lupin,

1 417

How does HPLC Calculate Void volume?

Lupin,

1 439

What does theoretical plates number mean?

1 333

How do you increase the number of theoretical plates?

Cipla,

1 457

Why red HgI2 added during starch preparation?

1 414

What is the Formula for coreletion coefficient in plhplc calibration

221

How to calculate coreletion coefficient

253


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Un-Answered Questions { Analytical Chemistry }

are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

785


what are the standard methods for HPLC?

1567


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

950


What is the difference between purge septum flow and column flow in gas chromatography?

859


How to check hplc detecter sensitivity?

324






How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1259


give clarity of linearity and range in method validation

1021


how the compound separate in coulunm,explain

1111


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

799


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

732


what type of question will ask in the interview of lab chemist.

2180


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

974


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?

1386


what is %labelled amount in content uniformity of dosage unit and its calculation?

3686


Difference between hlaf and rlaf

774