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Uniformity of dosage units <6.02> Perform the test accord-
ing to the following method: it meets the requirement of the
Content uniformity test.
Disintegrate 1 tablet of Pioglitazone Hydrochloride
Tablets with 10 mL of 0.1 mol/L hydrochloric acid TS, add
70 mL of methanol, shake vigorously for 10 minutes, then
add methanol to make exactly 100 mL, and centrifuge. Take
exactly V mL of the supernatant liquid, add a mixture of
methanol and 0.1 mol/L hydrochloric acid TS (9:1) to make
exactly V?mL so that each mL contains about 26 mg of
pioglitazone hydrochloride (C 19 H 20 N 2 O 3 S.HCl), and use this
solution as the sample solution. Separately, weigh accurately
about 33 mg of Pioglitazone Hydrochloride RS (separately,
determine the water <2.48> in the same manner as Pioglita-
zone Hydrochloride), dissolve in 10 mL of 0.1 mol/L hydro-
chloric acid TS, and add methanol to make exactly 100 mL.
Pipet 4 mL of this solution, add a mixture of methanol and
0.1 mol/L hydrochloric acid TS (9:1) to make exactly 50 mL,
and use this solution as the standard solution. Determine the
absorbances, A T and A S , of the sample solution and stand-
ard solution at 269 nm as directed under Ultraviolet-visible
Spectrophotometry <2.24> using a mixture of methanol and
0.1 mol/L hydrochloric acid TS (9:1) as the blank.

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