id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ecletica-453	Matos, Geraldo Domingues; Tarley, César Ricardo Teixeira; Ferreira, Sérgio Luis Costa; Arruda, Marco Aurélio Zezzi	Use of experimental design in the optimisation of a solid phase preconcentration system for Cobalt determination by GFAAS	2005	10	.pdf	application/pdf	4224	207	53	Although preconcentration factor is considered the most usual procedure to evaluate the performance of preconcentration system, this concept cannot be used alone because, in general, higher preconcentration factors are obtained when high sample volume preconcentration are employed. Consumptive index is expressed by volume of analyte solution Vs and the PF ratio (CI = Vs/PF), thus indicating the necessary volume to attain one unit of preconcentration factor.	cache/ecletica-453.pdf	txt/ecletica-453.txt