Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What are the different types of columns used in HPLC

Wockhardt,

3 8977

In HPLC when we use Isocratic method, Gradient method in hplc?

Pharmaceutical,

8 14308

Any molecule is filing for ANDA purpose, what are the dissolution requirements / specifications needed ?

IPCA,

1 3975




What is Endcapped Hplc column

2 6690

Why we more noise in PDA detector compared to UV detector?

Aurobindo,

1 8707

if the purity is 99.9%,is need to do assay?

Reddy Labs,

3 11328

What is the difference between specified impurity and Identified impurity

Glenmark,

3 9856

What is the difference between specified impurity and Identified impurity

Merchant Navy,

1 2917




how do you established the RRF for unknown impurity

Square Pharma,

3 7939

I want analyze my compound at 325 nm so which standard shall i use to calibrate my HPLC system? How i can assure my hplc detector is suitable or not?

AMRI,

2 6498

How we will choose pH of a mobile phase if analyte pKa value is 4

Laurus, Celon Labs,

2 8112

what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

Laurus, DRL,

2225

Which column is more polar, C8 or C18?

Glenmark, Cipla, Laurus, Torrent Power,

6 20651

what is the difference between heavy metals and sulphated ash

Aurobindo,

2 11778

what is difirence b/w ROI&ROE

Pfizer,

1 6817


Post New Analytical Chemistry Questions






Un-Answered Questions { Analytical Chemistry }

what is partion and column chromatography

1059


What is the main difference between ODS1 and ODS2 Hplc column.

1958


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2225


how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

1011


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

692






How can I develope method of dissolution by HPLC OR UV

996


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

332


why 6 tablets use for dissolution

1908


Tell me something about Vitamin A test method by HPLC

1369


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

1006


What is the principle of Thermal conductivity detector and FID?

1452


iam usig ph buffers merk. manually how to prepare ?

1009


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

970


what is procedure of actual procedure for registration of drug?

665


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

1240