Utilização de planejamento fatorial no preparo de amostras de detergente em pó para a determinação de fósforo por análise em fluxo

Química Nova

Fabíola Soraia Vital Campos Barbosa Da Silva²  Valdinete Lins Da Silva¹  André Fernando Lavorante¹  Ana Paula Silveira Paim² 

[1] ,Universidade Federal de Pernambuco Departamento de Química Fundamental Recife PE

关键词: digestion;    phosphate;    detergents;   

DOI  :  10.1590/S0100-40422010000500035

来源: SciELO

【 摘 要 】

The decomposition of detergent powder samples in a microwave oven and autoclave was evaluated. To establish the best experimental conditions a 2(5) factorial design was performed, varying the conditions in autoclave and microwave digestion and flow system parameters for the determination of phosphorus. The best composition was: 0.2 mL sulfuric acid; 500 W power and a 2 min time interval; 6 mmol L-1 of ascorbic acid and 16 mmol L-1 of molybdate to flow system. This factor levels use less reagents than the reference method. No statistically significant differences were found between the autoclave and microwave oven responses at the 95% confidence level.

【 授权许可】

CC BY-NC   
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