Evaluation of sample preparation of the detergent powder using factorial design

Quimica nova

Silva, Valdinete Lins da¹  Paim, Ana Paula Silveira²  Silva, Fabíola Soraia Vital Campos Barbosa da³  Lavorante, André Fernando⁴ 

[1] Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Recife, Brasil;Universidade Federal Rural de Pernambuco, Recife, Brasil;Universidade Federal de Pernambuco, Recife;Universidade Federal de Pernambuco, Recife, Brasil

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 decompositionof detergent powder samples in a microwave oven and autoclave was evaluated.To establish the best experimental conditions a 25 factorial designwas performed, varying the conditions in autoclave and microwave digestion andflow system parameters for the determination of phosphorus. The best compositionwas: 0.2 mL sulfuric acid; 500 W power and a 2 min time interval; 6 mmol L-1of ascorbic acid and 16 mmol L-1 of molybdate to flow system. Thisfactor levels use less reagents than the reference method. No statisticallysignificant differences were found between the autoclave and microwave ovenresponses at the 95% confidence level.

【 授权许可】

CC BY