A: Infrared Absorption 197K.

B: Ultraviolet Absorption 197U—

Standard preparation— Dissolve an accurately weighed quantity of USP Maltol RS in 0.1 N hydrochloric acid, and dilute quantitatively, and stepwise if necessary, with 0.1 N hydrochloric acid to obtain a solution having a known concentration of about 0.01 mg per mL.

Assay preparation— Transfer about 50 mg of Maltol, accurately weighed, to a 250-mL volumetric flask, dissolve in and dilute with 0.1 N hydrochloric acid to volume, and mix. Pipet 5 mL of this solution into a 100-mL volumetric flask, dilute with 0.1 N hydrochloric acid to volume, and mix.

Procedure— With a suitable spectrophotometer, using 0.1 N hydrochloric acid as a blank, concomitantly determine the absorbances of the Standard preparation and the Assay preparation at the wavelength of maximum absorbance at about 274 nm. Calculate the quantity, in mg, of C6H6O3 in the portion of Maltol taken by the formula: in which C is the concentration, in mg per mL, of USP Maltol RS in the Standard preparation; and AU and AS are the absorbances obtained from the Assay preparation and the Standard preparation, respectively.