Ultrasound-assisted surfactant-enhanced emulsification microextraction combined with hplc for the determination of estrogens in water

Abstract

detector de arranjo de diodos para a determinação de 17β-estradiol (βE2), estrona (E1) e dietilestilbestrol (DES) em água. Ultrassom foi aplicado para auxiliar a emulsificação e Triton X-100 foi usado como dispersor e emulsificante. Tetracloreto de carbono foi usado como solvente extrator. Empregando otimização global, o procedimento foi caracterizado por um intervalo linear aceitável de 10 a 1000 ng mL -1 para βE2, E1 e DES (r > 0,997), exatidão e precisão validadas (RSD 0,85-1,28% (n = 5)) e alta sensibilidade com limites de detecção de 0,200, 0,100 e 0,125 ng mL -1 para βE2, E1 e DES, respectivamente. O procedimento foi aplicado para a análise de amostras típicas de água, com fatores de enriquecimento de 85,29, 173,45 e 97,05 para βE2, E1 e DES, respectivamente, e boas recuperações (≥ 89,82%). De maneira geral, o procedimento desenvolvido foi simples e confiável, com potencial de aplicação em larga escala para análises da água.An ultrasound-assisted surfactant-enhanced emulsification microextraction (UASEME) combined with high performance liquid chromatography-diode array detector procedure was developed for the determination of 17β-estradiol (βE2), estrone (E1) and diethylstilbestrol (DES) in water. Ultrasound was applied to assist emulsification, and Triton X-100 was adopted as the disperser and emulsifier. Carbon tetrachloride was applied as the extraction solvent. Global optimization was used and the developed procedure was characterized by an acceptable linear range of 10 to 1000 ng mL -1 for βE2, E1 and DES (r > 0.997), a validated accuracy and precision (RSD 0.85-1.28% (n = 5)), and high sensitivity with limits of detection of 0.200, 0.100 and 0.125 ng mL -1 for βE2, E1 and DES, respectively. Furthermore, we applied this procedure to analyze typical water samples, with enrichment factors of 85.29, 173.45 and 97.05 for βE2, E1 and DES, respectively, and good recoveries (≥ 89.82%). Altogether, the proposed procedure was simple and reliable, with potential application in large-scale water analysis.

Extracting organic matter on Mars: A comparison of methods involving subcritical water, surfactant solutions and organic solvents

“…The versatility of surfactant based extraction has been proven in different areas ranging from soil remediation (Chu and Chan, 2003;Villa et al, 2010), waste water analyses (Zou et al, 2012), to petroleum geoscience where constituent organic compounds in petroleum source rock, such as naphthalene and phenanthrene, can be extracted using non-ionic surfactant solutions (Akinlua et al, 2012).…”

Bilanthanide Metal–Organic Frameworks for Instant Detection of 17β‐Estradiol, a Vital Physiological Index

“…[ 9 ] Drastic changes for the concentration of 17β‐estradiol in the body can implicate a lot of information: the decreasing of 17β‐estradiol can lead to reproductive abnormalities, infertility, and reproductive organ atrophy; the increasing concentration of 17β‐estradiol may lead to uterine fibroids, breast hyperplasia, and endometrial dysplasia. [ 10 ] In addition, 17β‐estradiol is regarded as a carcinogen and required to be strictly monitored in the environment. [ 11 ] In the past period, advanced analytical techniques have been reported for the detection of 17β‐estradiol such as high‐performance liquid chromatography and electrospun simple colorimetric probe, [ 10 ] but these methods usually require complicated and expensive instruments, toxic reagents, and long analysis time.…”

“…[ 10 ] In addition, 17β‐estradiol is regarded as a carcinogen and required to be strictly monitored in the environment. [ 11 ] In the past period, advanced analytical techniques have been reported for the detection of 17β‐estradiol such as high‐performance liquid chromatography and electrospun simple colorimetric probe, [ 10 ] but these methods usually require complicated and expensive instruments, toxic reagents, and long analysis time. As alternative methods, luminescent sensing materials provide an accurate, rapid and low‐cost method for the instant detection of 17β‐estradiol in daily physical examination.…”

The simultaneous analysis of sulfonylurea herbicide residues in fruit samples using ultrasound-assisted surfactant-enhanced emulsification microextraction coupled with high-performance liquid chromatography

“…UASEME has also been proven to be a more efficient technique for the enrichment of analytes than DLLME. 16 UASEME has been successfully used as a preconcentration method and is usually coupled with high performance liquid chromatography (HPLC) for the analysis of various residues such as organophosphorus pesticides, 15 carbalinate and anilinopyrimidine fungicides, 16 carbamate pesticides, 17 estrogens, 18 polycyclic aromatic hydrocarbons, 19 phenylurea herbicides 20 and azole antifungal pharmaceuticals. 21 The application of microextraction methodologies for the analysis of sulfonylurea herbicides (SUHs) has been limited with only a few studies using dispersive solid-phase extraction (DSPE) and DLLME prior to HPLC for analysis of SUHs in soil 22 and water, 23 and DSPE-DLLME with micellar electrokinetic chromatography (MEKC) for SUHs residue in soil samples.…”