After dilution of the samples with the mobile phase , COMPOUND_XXX concentrations were measured by HPLC coupled to a UV detector set at 214 nm , and they were quantified by using the area under the peak .
After dilution of the samples with the mobile phase , COMPOUND_XXX concentrations were measured by HPLC coupled to a UV detector set at 214 nm , and they were quantified by using the area under the peak .
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