Avaliação de adsorventes sólidos para determinação de desreguladores endócrinos em esgotos sanitários

Abstract

In recent years, many methods for analyzing endocrine disrupters (ED) in water samples were published, but it is still difficult to detect these compounds in the environmental matrices precisely, because they are found. Despite the high sensitivity of HPLC, this technique has some limitations and requires technical preconcentration of analytes before injection equipment. The efficiency of the SPE cartridges depends on several parameters such as breakthrough volume, which determines the maximum volume of water sample can be pre- concentration the cartridge. In this study three different adsorbents preconcentration of ED three different categories: pharmaceuticals (sulfamethoxazole, trimethoprim and diclofenac), hormones (estrone, 17β-estradiolacetate and 17β-estradiol) and plastics (bisphenol A) in solution aqueous multicomponent. The adsorbents were: one modified silica (octadecylsilane) - DSC-18 (Supelco), and the two polymers, one divinylbenzene-N-vinilpirolidona - Oasis ® HLB (Waters), and a styrene-divinylbenzene modified with butyrolactone - Strata-X ™ (Phenomenex). The parameters selected for evaluating the best adsorbent were recovery and adsorption capacity. The results showed that the Oasis and Strata cartridges showed good separation and selective ability, suggesting that they may be useful technique for