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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

wen v have polr solvent then which type of column use in hplc

2 6729

What is Threshold in hplc?

Hetero,

2 18019

Why we use Caffeine in hplc calibration

Emcure, Laurus,

2 11996

what is the meaning of stress study?

Reddy Labs,

2 3788

what is the difference between potentiometric assay and hplc assay

Parabolic,

2 16017

why we are using buffer solutionas as a mobile phase in hplc.

2 9910

importance of internal standard and in what conditions it is used?

1 3643

how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1822

how to select short coloum and long coloumn for new molecule

Rampex Labs,

1656

what is poarimeter, why it is used in pharma,and explain briefly about polarimeter?

GVK,

3 9219

Why KBR is used in IR for preparation of pellete, why it shows zero dipole moment

GVK,

7 11227

what is optical active and non active give examples?

GVK,

1 4000

what is custom fields in waters system?

Akorn India, Aurobindo,

1 7400

my name is santhosh i cmpleted b.pharmacy in 2009 then i went to uk in 2010 to pg diploma business management. after i came back to india.. recently again apply to uk for pharmaceutical analysis. they refused my visa you failed to explain y u r change subject. so plz ineed answer for y change the cource

1 2391

why kbr is used for pellet preparation in ir spectroscopy, give the reasons? why kbr shows zero dipole moment?

6 14698


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

What is the purpose of octyl silane columns?

3561


Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

110


If vendor having more imp than monograph then how to proceed? and how to set spec?

115


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?

3284


How do we fix the sample concentaryion in hplc method development?

487






what is the purge flow & how to calculate

1804


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.

1530


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

8457


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1139


what is peak purity and its formula

921


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

1443


Why potassium dichromate is used in calibration of uv?

1132


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

1419


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1951


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1822