Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why sucrose is used for polarimeter calibration

4 29483

why 0.005 M sulphuric acid is used to calbrate spectrophotometer and why caffiene is used for calibrating hplc

Torrent Pharma, GVK,

2 15557

why we use caffeine for hplc calibration?

5 14438




what is polarity and how to calculate

Reddy Labs,

2 8300

How to calculate the maximum loaded sample concentration in HPLC column?

2 7419

What is the difference between HPLC and GC?

3 14995

Why linearity of detector performed in HPLC calibration

Cipla, Intas,

2 10787

how to start the method development of Dissolution and related substances.

Apex,

1 8192




what is the criteria for choosing capillary column in GC??is it dependent on sample load?

2 4340

When we calculate Impurity against impurity std.solution and when we calculate impurity against diluted standard with applying RRF?

Torrent Pharma,

2 7654

What is discriminating media? How can u justify/select that which media (pH etc...)is suitable for your dissolution study of your compound?

Natco, SUN,

5 20728

What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

Natco,

5127

How can I develope method of dissolution by HPLC OR UV

923

Give me details about dissolution , with name ?

EPCA,

1 1385

As per USP what is RSD limit of volumteric solution of three replicate analysis

Orchid,

10 15416


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Un-Answered Questions { Analytical Chemistry }

Why dissolution test is not performed in all of the products

1134


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1343


Why we check moisture,ash & AIA in product

423


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

736


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

1108






What is the meaning of Base deactivated vials

959


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

241


What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

5127


How to choose concentration of LOQ solutions for RS analysis? Example.

702


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

5304


Why sodium hydroxide used for maintain pH of phosphate buffer

860


How you develop a method in HPLC?

1230


What are modes of quantification in related substances

839


why we are using hexane in calibration of number of drop per mL

183


what is turbidimetric titration?Give 2 examples.

1002