Rotavapor system

Manufactured by Büchi

Sourced in Switzerland

The Rotavapor system is a laboratory equipment designed for the gentle and efficient removal of solvents from samples through evaporation. It operates on the principle of rotary evaporation, where the sample is gently heated and rotated under vacuum, facilitating the evaporation of the solvent.

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Rotavapor (188 citations) R-215 Rotavapor System (5 citations) Rotavapor R-300 System (4 citations) R-210 Rotavapor System (4 citations)

2 protocols using rotavapor system

Extraction and Identification of Packaging Migrants

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Several candy wrappers based on plastic and paper materials and from different brands and two popcorn packages were analyzed in order to identify potential migrants. Table 1 summarized the samples analyzed in the study.
To extract the migrants, a known surface of the packaging material was put in contact with 25 mL of acetonitrile for 6 h at 70 °C. Then, the extracts were evaporated in a rotavapor system (Buchi, Postfach, Switzerland), and the residue was re-dissolved in a known volume of acetonitrile. An aliquot of the resulting solution was filtered through a 0.45 μm filter (Advanted, Toyo Roshi Kaisha, Ogawa-machi, Hiki-gun, Saitama, Japan) and injected into the GC-MS.

Galmán Graíño S., Sendón R., López Hernández J, & Rodríguez-Bernaldo de Quirós A. (2018). GC-MS Screening Analysis for the Identification of Potential Migrants in Plastic and Paper-Based Candy Wrappers. Polymers, 10(7), 802.

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Efficient OD-PABA Photocatalytic Deposition

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A stock solution of OD-PABA was prepared in methanol at a concentration of 60 mg/L. The photocatalyst in powder form was then added to obtain a TiO2 loading of 200 mg/L, after which the methanol solvent was evaporated in a Büchi Rotavapor system to allow the deposition of OD-PABA onto TiO2. The recovery of the dry powder was carried out with ultrapure water. Five milliliters of the suspension thus obtained were introduced into cells of Pyrex glass and subjected to irradiation with a lamp Philips TLK 05 40 W, with emission maximum at 365 nm. After irradiation the content of the cells was recovered with 5 mL methanol (same reason as above) and filtered on a 0.45 µM syringe filter (hydrophilic PRFE, Millipore) to remove TiO2. OD-PABA recovery was >90%.

Calza P., Vione D., Galli F., Fabbri D., Dal Bello F, & Medana C. (2016). Study of the photochemical transformation of 2-ethylhexyl 4-(dimethylamino)benzoate (OD-PABA) under conditions relevant to surface waters. Water research, 88.

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