why we get negative values in uv when i placed sample which has some concetratio

why we get negative values in uv when i placed sample which has some concetration but not in standard

Question Posted / naresh

why we get negative values in uv when i placed sample which has some concetration but not in standar..

Answer / falguni patel

If u get negative values in sample and not in std that means your sample contains some excipients.

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