what are ligases?which type of reactions they will catalyse?1 6050
what happens when aminoacids react with alcohols?3 15659
what is the difference between coordinate covalent bond and covalent bond?9 30728
what are the 4 classes of unsaturated fatty acids?1 4906
why the atomic weights are in fractions?1 6505
How hydrate is forming along with API?
What is the calibration of uv process and preparation
What is the composition of Barford Reagent?
1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.
Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?
Explain how do you prepare a solution of 1 m hcl?
how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.
What is hybridyzation ? How can i find that which type hybridyzation in perticular compound like in CH4(hy is sp3).
what is biorelivent dissolution media?
Why is Francium(Fr) so difficult to react with water?
what is partion and column chromatography
What is the number of protons in an atom?
what is the difference between potentiometric titration and karl fischer titration?
Is it nessesary all multimedia dissolution require descriminatory?
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