Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution ( almost look like doublet). how can i get max resolution ? Is changing gradient method is usefull?

3 11177

what is the need of calulation of RRF of impurity in HPLC analysis?

9 28205

why SGF media used for dissolution . What is the use of it .can we use other media of lower pH instead ot this?

1 7794

what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

Graviti Pharmaceuticals,

2192

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.

Hetero, Reddy Labs,

1996

only one end point is possible for citric acid and we get 2 end points for di acid why?

Reddy Labs,

3 7239

why kf factor coming 0.5

Alkem Labs,

5 15495

For Recent draft guidelines for Dissolution test apparatus calibration, why removing the salicylate tables?

Alkem Labs,

3 9093

How can v calibrate ftir ? Plz explain me

Cipla,

2 17598

what is the diff betwen calibration and system suitability?

8 19411

Why Methanol used in KF Titration?

Glenmark, Lupin,

15 63370

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

Vardhman,

2 8002

why chiral separation?

1 7721

what is main use of primary standards in caliration

Lee Pharma, Lupin, Nectar Lifesciences,

2 5241

what are the important specifications for a Column ?

2 8973


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Un-Answered Questions { Analytical Chemistry }

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

1710


How to choose the which salt is suitable for mobilephase

2617


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

1764


if your product is soluble in 0.1n hcl and water then which you choose as media from these 2 media?

249


all types of questions asked at the cipla interview

4123






iam usig ph buffers merk. manually how to prepare ?

1757


How we choose the mobile phase for method development.?

625


how to get accurate result for Residue on evaporation in purified water

1093


Did anybody have method for acetyl cysteine effervescnce tablet

1792


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

8284


What is related substance by HPLC impurity limits as per USP?

532


how can I make the copper get white bye any salt or acit?

1639


Principle of single pan analytical balance

4576


in which situation ion pair require to use?

261


UV and PDA detector, which have less signal to noise ratio?

620