Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

solvents used in NMR

Laurus,

2 4532

what does 'n' stands for in spectroscopy?give the formula.

Laurus,

1156

define beer-lambertslaw.

Laurus,

5 8993




difference between precision & accuracy.

Laurus,

1 8411

formula for %RSD.

Laurus,

4 10456

which chromatographic technique is used for softening hard water?

Laurus,

1 4706

Nitrogen test is used for which chromatography?

Laurus,

1 5085

what are the primary standards of redox titrations?Name any two.

Laurus,

2 6309




In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

Laurus,

1000

mode of absorption in alimentary canal?

Sun Pharma,

1188

why we calibrate ph meter and balance daily.....but hplc and uv requires quaterly?

Apotex, UPL,

5 14697

why we are use metthanol variously in kfr?why don't use other solutions?

4 8134

when we use capillary and packed columns in gc

Rakshit Drugs,

4 6152

what is the difference between IR and FTIR instrument analysis

2 8760

how can give the expiry period and restadardisation of volumetric solution

Meenaxy Pharma, SRF,

1322


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Un-Answered Questions { Analytical Chemistry }

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1228


iam usig ph buffers merk. manually how to prepare ?

1009


why are measure gas flow " ml " in Gas chromatography

398


How will u perform degradation study in detectors other thann PDA in HPLC Methodology

1263


pharma industries oriented

863






how to select short coloum and long coloumn for new molecule

1049


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

579


Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

1265


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

705


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

811


My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

231


How you develop a method in HPLC?

1315


EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1352


why we are using hexane in calibration of number of drop per mL

259


Identify problem faced when mass spectroscopy is used with HPLC system ?

705