SpectroFilm® offers the analyst a practical means to protect the x-ray tube and detector windows and related electronics from exposure to accidental sample material spillage. This is easily accomplished by affixing a self-sticking SpectroFilm® Safety Secondary Window between the stage separating the lower electronics compartment and upper sample chamber.
A SpectroFilm® Self-Sticking Safety Secondary Window consists of a thin-film substance pre-affixed to a blue paper frame with a central aperture and an adhesive backing on the obverse side. Adhesive is protected with a removable release paper to expose the adhesive in readiness for attachment covering the opening in the platform intended to maintain separation between the sample holder and electronics chambers. Sample spillages are collected on the thin-film substance.
For ease of identification, the obverse side of the SpectroFilm® is dark blue and the reverse side is lighter in color attributed to the translucence of the white release paper. SpectroFilm® is available with square or round paper frames of user choice. Removal of the release paper exposes the adhesive to secure the SpectroFilm® Safety Film in position.
Etnom® was the first thin-film substance to chemically resist attack by aliphatic and especially aromatic hydrocarbons and have the unique characteristic of contracting when exposed to petrochemical hydrocarbons. This unique characteristic allows the thin film to remain taut when exposed to samples containing these hydrocarbons and maintain a consistent taut flat sample support window plane during the entire integration time of analysis. Etnom® is available in a variety of thicknesses ranging from 1.5 through 3.0µm; it is frequently used and ideally suitable for sulfur analysis in aliphatic and particularly aromatic hydrocarbons. 2.0, 2.5 and 3.0µm Etnom® thin-films are limited in availability only to SpectroMembrane® Carrier Frames.
Prolene® thin-film is a two constituent element combination of carbon and hydrogen. The light carbon and hydrogen element constituents together with gauge thickness translate into mass attenuation coefficients providing high % Transmittance values, an advantage for investigating the less energetic (KeV) analyte spectral lines in low element concentrations. Prolene® represents a good general purpose thin-film for most chemical solution samples except for those that consist of ethers or aromatic and halogenated hydrocarbons. It also is characterized with a relatively high sample retention tensile strength for safely containing samples in their sample cups. Prolene® thin-film is available in 3.0 and 4.0µm gauges and in SpectroMembrane® Carrier Frames.
At one time, Mylar® thin-film was the only substance used in the XRF spectrochemical field and supplied only in roll form. With the passage of time, Chemplex® introduced the expansion of the Mylar® product line to include additional gauges and all other forms of physical presentation such as pre-cut square sheets, pre-cut circles, perforated pre-cut squares in rolls and recently in SpectroMembrane® Carrier Frames. Mylar® is a relatively good thin-film substance for general purpose aqueous sample solution containment. It is has an excellent sample retention tensile strength. It is not suitable for containing aliphatic alcohols, alkalies, esters, aromatic hydrocarbons and keytones.
Reg. US Patent No: 8,565,375
® Prolene, SpectroFilm, Etnom and Chemplex are registered trademarks of Chemplex Industries, Inc; all rights reserved.
® Mylar is a registered trademark of E.I. DuPont de Nemours & Co.