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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?

1813

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

1876

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?

1967

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

2245

in sampling of raw material which side is pasted sampled labels

1888

why holium oxide prepared in 10% HCLO4 SOLUTION

1497

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

1980

What is the importance of rrf in rs by HPLC?

1 3293

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

1458

please explain about aluminium hydroxide assay

1187

How to know the estimated LOQ concentration in ppm

1279

What is the difference between c8 and c18 hplc column?

1 2260

Why karl fisher factor is 5 ?

1 2248

Loss of linearity in tkn analysis, possible reasons?

1365

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

1567


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

What is split ratio in Gc? Splitless? how requirr to select?

943


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

2892


what is the origin to prepare standard operating procedure

2405


What is the difference between spectro meter and spectro photo meter?

11620


what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

10067


what is mean by covalidation

833


inhouse product is in capsule form in combination and RLD is in tablet form then can we proceed for multimedia CDP? in inhouse capsule product disso is paddle with sinker in release media is there then RLD product in tablet form then with same as paddle with sinker we can proceed n.a.?

774


what is mean by ambient temperature?

983


how will you do the prep for unstable componds?

2070


which situation gc hs and gc als require to use?

840


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

735


how pda detector works over uv?

780


what is the disso medium for tropsiun chloride

2314


how you start RS method development when for new product?

780


A ha tc is actual defination of retention time?

1664