• XRF Sample Cups
• XRF Sample Cup Thin Film Windows
  • How to Select a Thin-Film Window
  • Thin-Film Window Continuous Rolls and Precut Circles
  • Spectromembrane Thin-Film Window Frames
• Microporous Film
• Sample Cup Accessories

XRF Sample Cup Thin-Film Windows

The eligibility of a Thin-Film Window to qualify for retaining diversified sample substances in XRF Sample Cups must meet specific requirements. The material must offer a reasonable degree of chemical attack resistance; provide relatively high analyte-line transmission values especially for the less energetic or longer wavelengths; possess sample retention strength; have uniformity of thickness; and be reasonably free of impurities. Few substances comprehensively possess these properties. The most suitable are typically: Polyester, Prolene^®, Polypropylene, Polyimide (Kapton^®), Mylar^® and Etnom^TM Thin-Films.

Typical Properties of Thin-Film Windows

• Thickness uniformity within 1-2% per package; less than 5% between different lots.
• Multiaxial to minimize preferred orientation influences.
• Highest purity available

Window Material	Typical Uniformity	Typical Impurities, PPM	Density, GM/CC	Structural Formula
Mylar®, Hostaphan®, Polyester	1 - 2% per package; less than 5% between different lots	Ca, P, Sb, Fe, Zn	1.38	C10H8O4
Prolene®, Polypropylene		Ca, P, Fe, Cu, Zr, Ti, Al	0.91	C3H6
EtnomTM		Si, Ca, P, Zn, Sb	1.36	C14H10O4
Polyimide (Kapton®)		Insignificant influence	1.42	C20H10O5N2

	CONTINUOUS ROLLS Thin Film Window Rolls are 3" x 300" (7.6 cm x 91.4 m) contained in serrated edged boxes. Pull out the required length and tear off against the cutting edge. Each roll serves approximately 1200 sample preparations depending upon sample cup dimensions and technique.
	PRE-CUT CIRCLES Pre-Cut Window Circles are 2.5" (6.4 cm) in diameter and packaged 500 and 1000 circles per box. Each circle is supported on individual carrier papers for ease of handling and to minimize contamination. Minimizes or eliminates trimming excess material with a scissors.
	PRE-MOUNTED SPECTROMEMBRANE® WINDOW FRAMES This is the ultimate in Thin-Film Window attachment. Perforated Windows are pre-mounted on carrier frames in 3" (76.2 mm) or 2.5" (63.5 mm) diameters. Pre-stretched to ensure taut sample planes, no troublesome static electricity and clippings, no direct handling of the window, no contamination possibilities, no waste and no experience necessary.

Step 1.
Place SpectroMembrane^® Over XRF Sample Cup

Step 2.
Press Snap-On Ring of Sleeve over SpectroMembrane^® and tear away Carrier Frame