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Is sonication essential in solubility testing of a drug
substance?
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Answer Posted / pharmainterview
There is no guideline which specifies the sonication
required or not for solubility. So some people prefer to
sonicate and other not. You can't say which one is wright
because you have no evidenced guideline.
Regards
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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
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