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

1120

Is napthalene aromatic?

768

What is colorimetry?

658

Besides the extent of branching, can you think of any other structural parameters that might lead to differences in physical properties? : Polymer Chemistry

678

Protactinium is a rare and highly radioactive element. How is its radioactivity utilized in various scientific and industrial applications?

129

why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

1758

What are constituents of brass?

744

Why ph scale range is 14?

621

I need organic mixture analysis viva questions & answers

5757

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

1111

what is mean by peak intigrity?

337

We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

1317

How can I develope method of dissolution by HPLC OR UV

1893

sir, what does happen ............? naphthal+benzene(or)toluee........> ?

1689

Tell me how many significant figures are there in the number 0.0036?

593