Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHY pKa value is more important than pH value of the mobile phase in HPLC?

151

Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

26

For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

21




In Assy by potentio metry titration method how select MET U ,DET U, SET U,

13

in sampling of raw material which side is pasted sampled labels

13


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Un-Answered Questions { Analytical Chemistry }

please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

403


What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

1388


In IR spectra, generally a molecule vibrates without apply emr or ir light?

625


why equlirium conatant of water have 14 value

981


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.

950






if you have given a blank water how you analyse by general analytical techniques?

786


WHY given much noise PDA dector then VWD Dector

742


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1524


how the compound separate in coulunm,explain

1111


WHY pKa value is more important than pH value of the mobile phase in HPLC?

151


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

935


How to do regeneration of Metacarb Pb plus column?

1338


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

303


Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

333




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