ASTM-F2102 › Historical Revision Information
Standard Guide for Evaluating the Extent of Oxidation in Ultra-High-Molecular-Weight Polyethylene Fabricated Forms Intended for Surgical Implants
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Scope
1.1 This guide covers a method for the measurement of the relative extent of oxidation present in ultra-high-molecular-weight polyethylene (UHMWPE) intended for use in medical implants. The material is analyzed by infrared spectroscopy. The intensity (area) of the carbonyl absorptions (>C=O) centered near 1720 cm-1 is related to the amount of chemically bound oxygen present in the material. Other forms of chemically bound oxygen (C-O-C, C-O-O-C, C-O-H, and so forth) are not captured by this guide.
1.2 Although this guide may give the investigator a means to compare the relative extent of carbonyl oxidation present in various UHMWPE samples, it is recognized that other forms of chemically bound oxygen may be important contributors to these materials' characteristics.
1.3 The applicability of the infrared method has been demonstrated by many literature reports. This particular method, using the intensity (area) of the C-H absorption centered near 1370 cm-1 to normalize for the sample's thickness, has been validated by an Interlaboratory Study (ILS) conducted according to Practice E 691.
Keywords
FTIR; implant; oxidation; oxidation index; UHMWPE; ICS Number Code 11.040.40 (Implants for surgery, prothetics and orthotics)
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13.01 (Medical and Surgical Materials and Devices)
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Document Number
ASTM-F2102-06
Revision Level
2006 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
May 1, 2006
Document Type
Guide
Page Count
4 pages
Committee Number
F04.15