994 resultados para Commercial Concentration
Resumo:
1882/01/30 (A4,N5).
Resumo:
1881/03/28 (A3,N13).
Resumo:
A flow injection spectrophotometric procedure exploiting merging zones is proposed for determining vitamin B2 (riboflavin) in pharmaceutical preparations. The determination is based on the red-colored complex formation between vitamin B2 and silver(I) which was measured at 520 nm. Vitamin B2 was determined in four pharmaceutical preparations in the 1.0 to 50.0 mg L-1 concentration range, with a detection limit of 0.5 mg L-1. The recovery from three samples ranged from 98.0 to 104.0 %. The analytical frequency was 42 h-1 and r.s.d. were lower than 1% for solutions containing 10.0, 30.0 and 50.0 mg L-1 vitamin B2 (n= 10). The results obtained in commercial formulations using the FIA procedure were in good agreement with those obtained by using a conventional fluorimetric procedure (r=0.9998) and also with the label values (r= 0.9997).
Resumo:
1880/04/05 (A2,N9).
Resumo:
1882/12/18 (A4,N51).
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1881/05/30 (A3,N22).
Resumo:
1883/02/26 (A5,N9).
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1883/01/29 (A5,N5).
Resumo:
1882/01/09 (A4,N2).
Resumo:
1882/06/05 (A4,N23).
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1880/02/23 (A2,N3).
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1882/05/08 (A4,N19).
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1880/03/15 (A2,N6).
Resumo:
1881/04/04 (A3,N14).
Resumo:
1880/08/02 (A2,N26).