On February 1, 2020, Trujillo-Rodriguez, Maria J.; Anderson, Jared L.; Dunham, Sage J. B.; Noad, Victoria L.; Cardin, Daniel B. published an article.Synthetic Route of 6197-30-4 The title of the article was Vacuum-assisted sorbent extraction: An analytical methodology for the determination of ultraviolet filters in environmental samples. And the article contained the following:
Vacuum-assisted sorbent extraction (VASE) has been applied in combination with gas chromatog.-mass spectrometry for the determination of UV filters in water samples. VASE is a variant of headspace extraction which was developed in conjunction with the sorbent pen (SP) technol. This technique combines the advantages of both stir-bar assisted extraction and headspace solid-phase microextraction The SP traps allowed both reduced pressure in-vial extraction and direct thermal desorption via a unique gas chromatog. injection port. The main parameters that affect the performance of VASE, including both extraction and desorption conditions, were extensively optimized. Under optimum conditions, extraction required 10 mL of sample within 40 mL vials, pH 3.5, ∼30 s of air-evacuation, 14 h incubation at 70°C, stirring at 200 rpm, and a final water management step conducted at ∼ -17°C for 15 min. Optimal thermal desorption required preheating at 260°C for 2 min followed by desorption at 300°C for 2 min. The beneficial effect of reduced-pressure extraction was demonstrated by comparing the UV filter extraction time profiles collected using VASE to an analogous atm. pressure procedure, resulting in up to a 3-fold improvement under optimized conditions. The VASE methodol. enabled simultaneous extractions using different SPs without compromising the method reproducibility, which increases the overall sample throughput. The method was characterized by low limits of detection, from 0.5 to 80 ng L-1, and adequate reproducibility, with inter-SP and inter-day relative standard deviation lower than 14%. Tap and lake water was successfully analyzed with the proposed methodol., resulting in relative recoveries of spiked samples ranging between 70.0 and 120%. The experimental process involved the reaction of 2-Ethylhexyl 2-cyano-3,3-diphenylacrylate(cas: 6197-30-4).Synthetic Route of 6197-30-4
The Article related to vacuum assisted sorbent extraction uv filter environment analysis water, environmental analysis, gas chromatography, mass spectrometry, ultraviolet filters, vacuum-assisted sorbent extraction and other aspects.Synthetic Route of 6197-30-4
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