Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is the purpose of Buffer in any titration?Ex:In determination of hardness of water we use ammonia ammoniachloride buffer in titration with EDTA.Why?

Amity, Sr Comunications, Prakriti,

13 76112

why KF factor is between 4.5 to 7.5 mg/ml ? why ? why sometime pyridine is used in analysis like in raw material solvent like acetone etc?

GVK, Sohan Healthcare, Aurobindo,

10 43173

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

Neuland,

3070




What is the Column Endcaping in HPLC ?

Aptuit Laurus,

3 10199

When performing Moisture content how to you say only Methanol react with water not product Explain?

Orchid,

2 7321

give me method of calculating co relation of coefficient for HPLC,SOR & ANY OTHER

1 1851

difference between pH & pOH ?

4 17144

what r the reasons to get peak telling?

Cipla,

6 10279




How we develop a method by HPLC for unknown compound,if we got three peaks with same response then how we can find out which one is our desired compound's peak without taking help of LC MS.

Apotex, Kemwell,

4 10074

In case of dissolution test, if there is variation within 6 individual units however the batch is complying as per S1 criteria, is it necessary to do investigation for the same? What should be the criteria for such variation?

1 2614

What is the difference between bulk property detectors and Solute property detectors vivimed labs limited

3 11586

IF THE COMPOUND PKA IS 5.3 WHY WE ARE ADJUSTING PH+/-2 OF THE COMPOUNDS PKA. WHAT IS THE CONDITION

Dr Reddys, Reddy Labs,

2 7259

What are the limits for uniformity dosage content for tablets and capsules

Micro Labs,

5 15441

WHAT IS THE USAGE OF REFRACTIVE INDEX IN PHARME FIELD

3 6325

IN DISSOLUTION TEST S1AND S2 AND S3 CONDITIONS ALL ARE FAILED THEN WHAT IS THE DESSICION U CAN TAKE

Cipla,

12 16620


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Un-Answered Questions { Analytical Chemistry }

What is the principle of Thermal conductivity detector and FID?

1400


What is the diference between residual solvents and organic volatile matter

661


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?

857


what is third integration

688


How to define samples weight in moisture content

110






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?

5725


sop of a uv visible spectrophotometer double beam elico model

4121


why disodium tartarate used in karl-fischer instrument ?.

688


can i use hplc detector to uplc and why?

925


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...

529


What is column in chromatography?

777


why octanol used to determine the partition coefficient ?

952


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1208


What is viod volume and peak purity in HPLC?

1328


Why potassium dichromate was using in Uv calibration?

344