Evaluation of sample preparation of the detergent powder using factorial design

Química Nova

Universidade Federal de Pernambuco, Recife¹  Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Recife, Brasil¹  Silva, Fabíola Soraia Vital Campos Barbosa da¹  Universidade Federal Rural de Pernambuco, Recife, Brasil¹  Universidade Federal de Pernambuco, Recife, Brasil¹  Paim, Ana Paula Silveira¹  Silva, Valdinete Lins da¹  Lavorante, André Fernando¹ 

关键词: digestion;    phosphate;    detergents.;   

DOI  :  10.1590/S0100-40422010000500035

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The decomposition of detergent powder samples in a microwave oven and autoclave was evaluated. To establish the best experimental conditions a 25 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】

Unknown