Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?
could negative ions be produced by bombardment process in mass spectrometry?
A ha tc is actual defination of retention time?
1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
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 potassium dichromate is used in calibration of uv?
Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc
why we are using hexane in calibration of number of drop per mL
Why to use propyl paraben in HPLC gradient calibration
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
Why perchloric acid used for potentiometric titration
What is the Formula for coreletion coefficient in plhplc calibration
How to calculate coreletion coefficient
WHY pKa value is more important than pH value of the mobile phase in HPLC?
