In burette calibration of Karl fischer Instrument, the multiplication factor 1.00693 is using for how much ml of water dispenced. why
1 1649In UV-VIS spectrophotometer:My diluent is methanol even though i corrected base line for methanol,In my sample scan i found methanol peak.what is the reason?
2 6726What is the diffrence between the performing of LOD ordinary drying at voven and vaccum method.
Apex,
4 6180how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.
1011in hplc calibration we are using 0.05% acetone why we are using that one and what happen when its conc increases or decreases
4 17814what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?
6581Post New Analytical Chemistry Questions
Why to use propyl paraben in HPLC gradient calibration
Can we interpret accuracy from linearity in method validation?
how to select short coloum and long coloumn for new molecule
What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?
WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?
What is stray light in uv what are units for stray light
what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?
Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?
how to calibrate hplc & gc
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.
Why potassium dichromate was using in Uv calibration?
calibrtion procedue of LC-MS
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
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?
