Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why water content test performed

1 3544

What is peak purity and response factor in chromatographic analysis? Why we required to find out response factor?

2 3752

What are modes of quantification in related substances

Hospira,

869




what is the source of ir spectroscopy

Mylan, CTX Life Sciences,

2 4350

Difference Between End Cap HPLC Column and Non End Cap Column

2 8087

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

Petronas, Shanghai Ocean University,

636

How would you decide dissolution medium for NCE compound of class I drug

705

What is the principle of hplc detectors like.. UV detector,flurosence detector, RID?

Cipla,

1212




What is the principle of Thermal conductivity detector and FID?

Cipla,

1401

why 6 tablets use for dissolution

Teva Pharmaceuticals, Cadila, IPCA, SUN,

1854

What is the limit of minimum area in in hplc RS anlysis

Lupin,

1 2536

how many types oos and oot

1 1787

what is icdas abbrivation

1 1875

Why should we use Potassium iodide and Hydrochloric acid during preparation of Iodine Molar solution?

1 1688

How can you calculate manually "Slope" in pH calibration?

Hetero,

2 11110


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Un-Answered Questions { Analytical Chemistry }

What are the primary considerations in extractables and Leachables ?

991


For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2415


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

678


How to determine water content of bis tetrazole amine mono ammonium salt

1898


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.

862






what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

3070


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

668


what are the standard methods for HPLC?

1483


Difference between hlaf and rlaf

675


How to do regeneration of Metacarb Pb plus column?

1249


what is the purge flow & how to calculate

1159


What is the calibration of uv process and preparation

672


why 6 tablets use for dissolution

1854


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

554


WHY given much noise PDA dector then VWD Dector

645