How long we can use hygroscopic reference standard in terms
of water absorb.I mean in line with respective monograph's
specification or more than that?
how can you determine a compound acidic or basic?
how to prepare 5normality of hcl
Why are use silicon oil mr?
Why chromic acid wash is not recommended by USP for glassware cleaning?
What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.
What is the purpose of performing dissolution test on routine basis?
Why we are having specification 100% above in case of assay as there is only 100% of compound?
2 Answers MSN Pharma, Nectar Lifesciences,
what is concentration of oxygen in U.H.P. grade N2 cylinder
Why linearity of detector performed in HPLC calibration
verification of wave number why you are use in IR calibration
which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc
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