Equipamento de baixo custo para extração em fase sólida em amostras aquosas de grande volume utilizando pressão positiva de N

Química Nova

Ananda L. Sanson¹  Bruno E. L. Baeta¹  Keila L. T. Rodrigues¹  Robson J. C. F. Afonso¹ 

[1] ,Universidade Federal de Ouro Preto Departamento de Química Ouro Preto MG ,Brasil

关键词: large volume of sample;    solid phase extraction;    positive pressure;   

DOI  :  10.1590/S0100-40422014000100024

来源: SciELO

【 摘 要 】

Extraction/concentration is a crucial step for the analysis of organic compounds at trace level concentrations and dispersed in complex matrices. Solid-phase extraction (SPE) is one of the techniques used for this purpose. In this work, a low cost apparatus for SPE was developed that uses nitrogen under positive pressure and ensures the maintenance of the sample flow, while also allows the simultaneous extraction of different samples without cross-contamination and sample contact with plastic materials. For the system set up, easily accessible materials were used such as hypodermic needles, stainless steel tubes, rubber stoppers, and 3-way valves from serum delivery apparatus.

【 授权许可】

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