Deep-eutectic-solvent-based dispersive and emulsification liquid–liquid microextraction methods for the speciation of selenium in water and determining its total content levels in milk formula and cereals

2020 ◽  
Vol 12 (43) ◽  
pp. 5186-5194 ◽  
Author(s):  
Ramsha Shahid ◽  
Tasneem Gul Kazi ◽  
Hassan Imran Afridi ◽  
Farah Naz Talpur ◽  
Asma Akhtar ◽  
...  
Keyword(s):  
Water Samples ◽  
Mineral Water ◽  
Deep Eutectic Solvent ◽  
Environmentally Friendly ◽  
Total Content ◽  
Milk Formula ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Rapid and environmentally friendly ultrasound-assisted dispersive liquid–liquid microextraction (US-DLLμE) and vortex assisted-emulsification liquid–liquid microextraction (VA-ELLμE) methods are proposed for the speciation of selenium in domestic and mineral water samples.

A solidified floating organic drop-dispersive liquid-liquid microextraction based on in-situ formed fatty acid-based deep eutectic solvents for extraction of benzophenone-UV filters from water samples

2021 ◽  
Author(s):  
Huazi Wang ◽  
Qinqin Xu ◽  
Jinglong Jiao ◽  
Hai Wu
Keyword(s):  
Fatty Acid ◽  
Water Samples ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Uv Filters ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

A solidified floating organic drop-dispersive liquid-liquid microextraction (SFOD-DLLME) was established for extraction of four benzophenone-ultraviolet filters (BP-UV filters) from water samples using a fatty acid deep eutectic solvent (DES) as...

Dispersive Liquid—Liquid Microextraction Based on Solidification of Floating Organic Drop Combined with High Performance Liquid Chromatography for Analysis of 15 Phthalates in Water

2019 ◽  
Vol 102 (3) ◽  
pp. 942-951 ◽  
Author(s):  
Danni Yang ◽  
Yi Yang ◽  
Yongxin Li ◽  
Shuo Yin ◽  
Yaling Chen ◽  
...  
Keyword(s):  
River Water ◽  
Water Samples ◽  
High Performance ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Uv Detection ◽  
Established Method ◽  
River Water Samples ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Abstract Background: Consistent toxicological evidence indicate that phthalates can cause adverse effects on human health. The concern over phthalate pollution and exposure has been emphasized in recent years. Therefore, the sensitive, reliable, and rapid detection of phthalates in water is of great importance. Objective: In this study, dispersive liquid–liquid microextraction based on solidification of floating organic droplet (DLLME-SFO) combined with HPLC-UV detection was established and applied in the preconcentration and detection of 15 phthalates in drinking and river water samples. Methods: A mixture of acetonitrile (dispersant) and 1-dodecanol (extractant) was injected into water samples, which had been added with sodium chloride. The cloudy solution was formed by hand-shaking. After centrifugation, the sample solution was cooled in a refrigerator, and the solidified organic droplet was collected. It melted at room temperature and was injected into the HPLC system for analysis. The quantification was based on the working curves. Results: Under optimum conditions, this method showed good linearity in the range of 0.1–100 or 0.5–100 μg/L with correlation coefficients greater than 0.999. The method had the LODs ranging from 0.013 to 0.16 μg/L with the enrichment factors of 102–218. The recoveries of the method ranged from 86.8 to 119% with RSDs less than 12.6%. The interday and intraday RSDs were 6.35–13.5% and 3.00–13.7%, respectively. The established method has been successfully applied to the analysis of phthalates in drinking and river waters. Conclusions: The established method is rapid, sensitive, cost-effective, and environmentally friendly. It can be applied to the analysis of 15 phthalates in drinking and river water samples. Highlights: A method of DLLME-SFO combined with HPLC-UV detection has been established for the analysis of 15 phthalates in drinking and river water samples. The established method was rapid, sensitive, accurate, cost-effective, and environmentally friendly. The established method was successfully applied to the analysis of 15 phthalates in bottled, tap, and river water samples.

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