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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

1718

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

1747

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?

1843

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

2079

in sampling of raw material which side is pasted sampled labels

1783

why holium oxide prepared in 10% HCLO4 SOLUTION

1409

Why 162 mg NaOH used for 1N volumetric solution in 150 ml water then 54.5 ml diluted with 1000 ml

1840

What is the importance of rrf in rs by HPLC?

1 3138

Why use only methanol,used determinationof moisture content not use other solvents

1362

please explain about aluminium hydroxide assay

1094

How to know the estimated LOQ concentration in ppm

1157

What is the difference between c8 and c18 hplc column?

1 2008

Why karl fisher factor is 5 ?

1 2053

Loss of linearity in tkn analysis, possible reasons?

1258

In rs method development when we are going area normalization method to dilute standard method?

1476


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

how can give the expiry period and restadardisation of volumetric solution

2530


Why we use potassium dichromate in uv calibration Exact reason behind it??

1190


how to develop the icp ms method? Application of icp ms?

750


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

2663


how decide the clining method and cleaning method validation require for this perticular products?

705


what is biorelivent dissolution media?

751


how we can identify the impurity is coming below loq at transfering site?

814




2263


In which situation we require to analytical method validation of excipient?

735


[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

750


HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

2190


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

2567


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

2780


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

1681


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

3428