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what is mean by ambient temperature?
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how you establish the LOQ?
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
What is discriminating media? How can u justify/select that which media (pH etc...)is suitable for your dissolution study of your compound?
why xterra column require to use at higher ph?
what is the difference between LOSS ON DRYING IN ORDINARY OVEN TECHNIQUE AND VACUUM OVEN TECHNIQUE
Why only lead standard solution is uesd to perform heavy metal test.
why chiral compounds will rotate the plane polarized light in SoR.
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 in hplc peaks are in positive side(it means upside) not in negative side?
what is classification of elemental impurities? what is risk assement in elemental impurities?
solvents used in NMR
Why we inject a standard 6 times for Related substances by HPLC and 5 times for Assay?
Organic Chemistry 
