Trazodone Hydrochloride Tablets
» Trazodone Hydrochloride Tablets contain not less than 90.0 percent and not more than 110.0 percent of the labeled amount of trazodone hydrochloride (C19H22ClN5O· HCl).
Packaging and storage Preserve in tight, light-resistant containers.
A: Thin-Layer Chromatographic Identification Test 201
Test solution Place a number of Tablets, equivalent to about 150 mg of trazodone hydrochloride, in a clean scintillation vial, add about 7.5 mL of methanol, and sonicate until the Tablets have disintegrated. Shake the vials, by hand, for a few seconds to mix, and filter to obtain the test solution.
Standard solution: 20 mg per mL, in methanol.
Application volume: 1 µL.
Developing solvent system: a mixture of cyclohexane, alcohol, toluene, and diethylamine (80:30:20:20).
Procedure: Proceed as directed in the chapter except locate the spots on the plate by examination under long-wavelength UV light.
B: The retention time of the major peak in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay.
Medium: 0.01 N hydrochloric acid; 900 mL.
Apparatus 2: 50 rpm.
Time: 60 minutes.
Determine the amount of C19H22ClN5O·HCl dissolved by employing the following method.
Mobile phase, Standard preparation, and Chromatographic system Proceed as directed in the Assay.
Procedure Inject an appropriate volume (about 20 µL) of a portion of the solution under test, previously passed through a 0.45-µm nylon filter, into the chromatograph, record the chromatogram, and measure the response for the major peak. Calculate the quantity of C19H22ClN5O·HCl dissolved by comparing this peak response with the major peak response similarly obtained from the Standard preparation.
Tolerances Not less than 80% (Q) of the labeled amount of C19H22ClN5O·HCl is dissolved in 60 minutes.
Uniformity of dosage units 905: meet the requirements.
Phosphate buffer Dissolve about 1.15 g of monobasic ammonium phosphate in 1 L of water, and adjust with sodium hydroxide to a pH of 6.0.
Mobile phase Prepare a filtered and degassed mixture of methanol and Phosphate buffer (3:1). Make adjustments if necessary (see System Suitability under Chromatography 621).
Standard preparation Dissolve an accurately weighed quantity of USP Trazodone Hydrochloride RS in 0.01 N hydrochloric acid, and dilute quantitatively, and stepwise if necessary, with 0.01 N hydrochloric acid to obtain a solution having a known concentration of about 0.100 mg per mL.
Assay preparation Weigh and finely powder not fewer than 20 Tablets. Transfer an accurately weighed portion of the powder, equivalent to about 10 mg of trazodone hydrochloride, to a 100-mL volumetric flask, dilute with 0.01 N hydrochloric acid to volume, and mix. Sonicate for about 30 minutes, and pass through a 0.45-µm nylon filter.
Chromatographic system (see Chromatography 621) The liquid chromatograph is equipped with a 246-nm detector and a 5-mm × 10-cm column that contains packing L1. The flow rate is about 1.5 mL per minute. Chromatograph the Standard preparation, and record the peak responses as directed for Procedure: the capacity factor, k¢, is not less than 1.5; the column efficiency is not less than 900 theoretical plates; and the relative standard deviation for replicate injections is not more than 2.0%.
Procedure Separately inject equal volumes (about 20 µL) of the Standard preparation and the Assay preparation into the chromatograph, record the chromatograms, and measure the responses for the major peaks. Calculate the quantity, in mg, of trazodone hydrochloride (C19H22ClN5O·HCl) in the portion of Tablets taken by the formula:
100C(rU / rS)in which C is the concentration, in mg per mL, of USP Trazodone Hydrochloride RS in the Standard preparation; and rU and rS are the peak responses obtained from the Assay preparation and the Standard preparation, respectively.
Auxiliary Information Please check for your question in the FAQs before contacting USP.Chromatographic Column
USP32NF27 Page 3777
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.