Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

about analytical chemistry

Apotex,

1996

What is differences between normality and molarity.in which cases both are used?

GVK,

1 7628

in gas chromatography what is the difference between gas flow rate and average linear velocity ?

USV,

2604

what are the ideal conditions for coloumn storage

Claris Lifesciences, Srikem Laboratories,

3 7317

i want to know about headspace and interview question on headspace

Srikem Laboratories,

1 5536

class of solvent regarding Residual solvent e.g. Acetone his class

1 4156

why we multiply 1000 in the determination of kf factor ?

Stellence Pharm Science,

3 8704

why we measure PH of a solution in PH only why not POH ?

Stellence Pharm Science,

1 5016

In Dissolution Test why limit is define Q+5% what is the role of +5%.

3105

Through assay by hplc(anhydrous basis) product got 100.8% .How much the potency of that product.Moisture content is 1.7%,Sulfated ash is 0.02%,Total impurities are 0.3%

2 6367

Why pyrene is also use for calibration if detector

Cipla, Dr Reddys,

1 4749

what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

Sandoz,

1974

In gas chromatographic analysis sometimes we use headspace, why it is required instead of manually injection?

1 4789

How to fix the sample concentration in related substances development.

Novartis, Watson Pharmaceuticals,

3 16847

Who discovered X-ray

Huntsman Corporation,

2 5147

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Un-Answered Questions { Analytical Chemistry }

How you develop a method in HPLC?

2617

In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

3178

What is similarity factor and its use in api strength?

1299

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.

2224

how decide the clining method and cleaning method validation require for this perticular products?

755

acceptance criteria for lod & loq by standard deviation of response and slope??

2592

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 ?

3669

In which situation we require to analytical method validation of excipient?

790

if your product is soluble in 0.1n hcl and water then which you choose as media from these 2 media?

682

what is mean by extactable and leachable study?

1174

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

3244

Why sodium hydroxide used for maintain pH of phosphate buffer

2414

How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3865

EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

2638

what are the standard methods for HPLC?

2786

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