Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why sucrose is used for polarimeter calibration

4 28784

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

Torrent Pharma, GVK,

2 15354

why we use caffeine for hplc calibration?

5 13819




what is polarity and how to calculate

Reddy Labs,

2 8130

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

2 7310

What is the difference between HPLC and GC?

3 14805

Why linearity of detector performed in HPLC calibration

Cipla, Intas,

2 10590

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

Apex,

1 8039




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

2 4279

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

Torrent Pharma,

2 7548

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 20408

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

Natco,

4985

How can I develope method of dissolution by HPLC OR UV

878

Give me details about dissolution , with name ?

EPCA,

1 1307

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

Orchid,

9 15082


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Un-Answered Questions { Analytical Chemistry }

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

605


In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1391


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?

2219


pharma industries oriented

751


iam usig ph buffers merk. manually how to prepare ?

911






USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

472


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1135


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

927


mahagenco syllabus for the post of chemist

4820


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

2015


What is column in chromatography?

723


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1584


What is gelatinization?

306


Explain the relations between number of carbon atoms in alkanes and retention time ?

538


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1007