Comparison of extraction techniques for isolation of steroid oestrogens in environmentally relevant concentrations from sediment

článek v časopise ve Web of Science, Jimp

angličtina

The comparison of four extraction techniques for isolation of five native and one labelled steroid oestrogens from sediment was described. The three conventional extraction techniques Soxhlet warm extraction (SWE), accelerated solvent extraction (ASE), microwave-assisted extraction (MAE) and a promising technique QuEChERS were tested for isolation of low environmentally relevant oestrogen concentrations using different extraction conditions. The least expensive and time-consuming method QuEChERS provided the best extraction recoveries (53–84%) from all techniques. MAE achieved the highest recovery from conventional techniques for less polar oestrogens using dichloromethane: acetone 3:1 mixture as an extraction solvent (50–71%), but for extraction of the whole group of oestrogens including more polar estriol acetone or methanol must be used. ASE provided higher extraction recoveries using dichloromethane at 60°C (53–74%) for less polar oestrogens. However, the repeatability of results was unsatisfactory and recoveries using other extraction conditions were lower than for MAE. The most time-consuming SWE achieved the worst extraction recoveries and for isolation of low oestrogen concentrations from sediments, it is completely unsuitable.

estrogens; sediment; Soxhlet warm extraction (SWE); accelerated solvent extraction (ASE); microwave-assisted extraction (MAE); quick easy cheap effective rugged safe (QuEChERS)

SADÍLEK, J.; SPÁLOVSKÁ, P.; VRANA, B.; VÁVROVÁ, M.; MARŠÁLEK, B.; ŠIMEK, Z.

15. 9. 2016

0306-7319

International Journal of Environmental Analytical Chemistry

96

11

Spojené království Velké Británie a Severního Irska

1022

1037

15