Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

i set electrode to 7 buffer than i used it to check 4 buffer and 10 buffer if the results are not as expected than is it better to set the buffer again to 4 buffer or is there any other method available please let me know ...

Glochem,

2 4658

How much is the standard area for glc analysis

998

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

DRL,

1251




what type of compounds do we see lod @ wat type compounds do we see m.c

Orchid,

3 6001

How can the GC or HPLC method is selected to determine the impurity profile in drug product?

Ajanta,

1 5522

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

Cipla, Rampex Labs,

2516

What the difference in loss on drying and residue on ignition

2 21418

Why irmoisture balance is used for corrugated box moisture testing

Lupin, Leiutis,

1131




why we are used 4,7,9,2 buffers for the ph calibration

Aurobindo, Enaltec Labs,

4 14783

In case of HPLC coloums what is the difference Between C8 & C18 coloums & how can we select difference type of coloums like Inertial ODS , Hypersil BDS , ODS etc.?

MSN Pharma,

4 25870

Is sonication essential in solubility testing of a drug substance?

Aurobindo,

6 10852

what is different between volumetric solution and general solution

1 14608

what is primary solution and secondary solution

2 5450

what is RI detector Cut-off Value

Mylan,

1 7472

In Related Substances Test how we can reside the limit of impurity ?

MSN Pharma,

2 8472


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Un-Answered Questions { Analytical Chemistry }

What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1082


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1211


i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

1461


Tell me about analytical method validation in QC

2124


what is the origin to prepare standard operating procedure

1010






Why we check moisture,ash & AIA in product

535


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

2516


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.

933


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

1085


Difference between hlaf and rlaf

748


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

1384


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 ?

2192


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1518


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

757


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

604