Interested to Buy Any Domain ? << Click Here >> for more details...
1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
1852My 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
1597We 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
1906Post New Analytical Chemistry Questions
Explain the relations between number of carbon atoms in alkanes and retention time ?
why are measure gas flow " ml " in Gas chromatography
how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.
for inorganic molecules require to do RS, Assay and disso?
what is classification of elemental impurities? what is risk assement in elemental impurities?
What are modes of quantification in related substances
function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?
what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?
what is mean by dissolution hydrodynamics?
I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?
why does used dry caffien in HPLC calibration?
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me
IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?
which situation gc hs and gc als require to use?
How to set specification of assay, fisdolution and related substances?
