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transferred to a 10 mL crimp headspace vial (P/N 10-CV) containing 60 µL 1-propanol (0.2 g/dL, internal standard). The vial was sealed (caps P/N 20-MCBC-ST3) and mixed prior to analysis. Instrument and method setup A Thermo Scientific ™ TriPlus 500 HS autosampler coupled to a Thermo Scientific ™ TRACE 1310 Gas
1. Ten tablets were dissolved in 10 mL of water and the mix centrifuged. Supernatant (2 mL) was transferred to a 20 mL headspace GC (HSGC) vial. 2. Ten tablets were dissolved in a mixture of water and DMSO (50:50). The mixture was centrifuged and the supernatant transferred to a 20 mL HSGC vial. Headspace GC-FID run conditions • Instrument
Fisher Scientific - Lagoas Park, Edificio 11 - Piso 0 - Porto Salvo Tel. +351 21 425 33 50 - Fax. +351 21 425 33 51 - pt.fisher@thermofisher.com
Thermo Scientific™ headspace vials are available in clear or amber glass with a round or flat base, a crimp seal with a beveled or square edge finish, or with a screw-thread finish. Headspace vials, septum, and caps can be purchased in various quantities separately or together as convenience kits to fit your laboratory needs.
Headspace vials are made of superior quality 1st hydrolytic class glass (Type 1) and have a thicker glass wall to withstand higher temperature and internal pressure for the analysis of volatile gas in the vial’s headspace. Thermo Scientific 20mm crimp top and 18mm screw top headspace vials are available in clear or amber glass in sizes
Description. Unlike crimp cap vials, Thermo Scientific™ National 18mm Screw Top Headspace Vials require no tools for closure. Manufactured with superior quality (Type 1, Class A) glass, they are available with a round bottom in sizes with usable volumes of 10mL or 20mL.
solution to a set of empty vials before the headspace analysis of the vials. For quantification by means of the standard addition method, cut samples of foil packaging from a commercially produced croissant product into square pieces of 48 cm2 each. Prepare five 20 mL sample vials by placing a foil piece in a headspace vial which is then crimped.
the headspace vial is 1 mL.When working in internal standard mode, 120 µL of n-propanol is also added to give a concentration of 0.1 g/dL into the headspace vial. To analyze real samples, transfer 1 mL of a biological specimen into a 20 mL headspace vial, add 120 µL (0.1 g/dL) of the n-propanol internal standard, apply the vial cap, and mix.
Description. Unlike crimp cap vials, Thermo Scientific™ National 18mm Screw Top Headspace Vials require no tools for closure. Manufactured with superior quality (Type 1, Class A) glass, they are available with a round bottom in sizes with usable volumes of 10mL or 20mL.
Description. Unlike crimp cap vials, Thermo Scientific™ National 18mm Screw Top Headspace Vials require no tools for closure. Manufactured with superior quality (Type 1, Class A) glass, they are available with a round bottom in sizes with usable volumes of 10mL or 20mL.
A sample surface of 40 cm2(2 × 20 cm) was cut, coiled, and sealed into a 10 mL crimp cap headspace vial (vials P/N 10CV, caps P/N 20-MCBC-ST3). As specified in the EN 13628-1:2002 method, the ratio between the sample area (in cm2) and the vial volume (in mL) was maintained between 3 and 5. 4
Improving Pharmaceutical Laboratory Throughput in the Analysis of Trace Impurities and Residual Solvents with Liquid/Headspace Unattended Switching S. Gemme 1 , M. Santoro 1 , F. Pigozzo 1 , E. Phillips 2 Thermo Fisher Scientific, Milan, Italy 1 , Thermo Fisher Scientific, Austin, TX, USA 2
in 20 mL or 40 mL vials without leaving headspace and, whenever possible, water should be carefully removed leaving 10 mL of sample into the vial for the headspace analysis. Toremove water samples without affecting the headspace, nitrogen can be pushed into the vial while water is withdrawn with the syringe.
0.25 µm film thickness (Thermo Fisher Scientific, Bellefonte, PA USA) 9.2 SPME fiber – 57341-U coated with PDMS, d f 100 µm Supelco Bellefonte, PA USA 9.3 Headspace vials – 20 mL flat 3205551 bottom, clear glass, beveled edge 9.4 PTFE – faced butyl rubber septa 3205532 for headspace vials – 20 mm, septa Butyl/PTFE
Class 1 standard stock solution to a 20 mL headspace vial, adding 5 mL of water, capping the vial, and mixing. Prepare a spiked test solution by transferring 5 mL of test stock solution to an appropriate headspace vial, adding 1 mL of the standard stock solution, capping the vial, and mixing. Figure 4. Resolution (R) between acetonitrile