What is difference between the working standard and reference standard?1 149
Why to use propyl paraben in HPLC gradient calibration
why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?
How to choose the which salt is suitable for mobilephase
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
In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?
How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium
Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?
What is the Formula for coreletion coefficient in plhplc calibration
are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????
What is delay volume?
For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?
in sampling of raw material which side is pasted sampled labels
cefoperozone and sulbactam inj. hplc test method
how much mass should be there in volumetric flask while in preparation of sample for assay?
What are modes of quantification in related substances