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Standard Preparation¡ª Pipet 5 mL each of the USP Alcohol Determination¡ªAlcohol RS and the USP Alcohol Determination¡ªAcetonitrile RS [note¡ªAlternatively, a 2% aqueous solution of acetonitrile of suitable quality may be used as the internal standard solution] into a 50-mL volumetric flask, dilute with water to volume, and mix.
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