Quartz tubes

Manufactured by Wilmad

Quartz tubes are cylindrical, transparent vessels made of high-purity quartz glass. They are primarily used in laboratory settings for various applications that require a chemically inert and thermally resistant container.

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Lab products found in correlation

Elexsys 580 spectrometer, by Bruker (1 mentions) Elexsys 500 spectrometer, by Bruker (1 mentions)

Close spelling variants of this product

Suprasil quartz EPR tubes (10 citations) Quartz EPR tubes (8 citations) Quartz EPR sample tubes (5 citations) EPR quartz tubes (4 citations) 4 mm quartz tubes (4 citations) 4 mm quartz EPR tubes (2 citations)

2 protocols using quartz tubes

EPR Spectroscopy of Frozen and Liquid Samples

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Spectra in the range of 125 to 320 K were acquired on a Bruker Elexsys 580 spectrometer equipped with an SHQE resonator and a Bruker continuous flow liquid nitrogen cryostat. Spectra at temperatures between 3.5 and 125 K were acquired on a Bruker EMX spectrometer using an ER 4116DM dual-mode resonator and an Oxford ESR910 helium continuous flow cryostat. Liquid samples for frozen solution experiments were loaded in 4 mm o.d. × 3 mm i.d. FEP tubes (Wilmad). Room-temperature liquid samples were contained in 1.8 mm o.d. × 1 mm i.d. Teflon tubing (McMaster-Carr), while powder samples were contained in traditional 4 mm o.d. × 3 mm i.d. quartz tubes (Wilmad). Microwave frequency was typically ~9.34 GHz (SHQE resonator) with a power of 20 mW. The field was swept from 0 to 8000 G in 168 s and modulated at a frequency of 100 kHz with 20 G amplitude. A time constant of 82 ms was employed.

Li Y., Xie Y., Wang Z., Zang N., Carniato F., Huang Y., Andolina C.M., Parent L.R., Ditri T.B., Walter E.D., Botta M., Rinehart J.D, & Gianneschi N.C. (2016). Structure and Function of Iron-Loaded Synthetic Melanin. ACS nano, 10(11), 10186-10194.

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EPR Analysis of Antioxidant Radicals

Cited 1 time

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X- band (≈9.4 GHz) EPR spectra were recorded at room temperature using a Bruker ELEXSYS 500 spectrometer (Bruker, Billerica, MA, USA). Irradiated rutin and quercetin powder samples were inserted in quartz tubes (Wilmad) that were placed into the resonator. We used low microwave power to record the spectra to avoid saturation of the EPR lines and each spectrum was accumulated 10 times due to the low EPR signal from the radicals. The concentration of free radicals was obtained by comparing the spectra of rutin and quercetin with the spectrum of a standard (Al₂O₃:Cr³⁺) with a known number of unpaired electrons. A more detailed description of the procedure for determining the concentration of radicals is elsewhere [28 (link),51 (link)].

Rosiak N., Cielecka-Piontek J., Skibiński R., Lewandowska K., Bednarski W, & Zalewski P. (2023). Do Rutin and Quercetin Retain Their Structure and Radical Scavenging Activity after Exposure to Radiation?. Molecules, 28(6), 2713.

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