Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D4526-12
• Năm ban hành / Publication date: 2012
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Practice for Determination of Volatiles in Polymers by Static Headspace Gas Chromatography
• Chỉ số phân loại Quốc tế (ICS) / By field: 83.080.01 - Chất dẻo nói chung
• Số trang / Page: 4

Phạm vi áp dụng / Scope of standard

1.1 Headspace gas chromatography (GC) involves the determination of volatile components in a polymer solution by gas chromatography of a vapor phase in thermal equilibrium with the sample matrix. Volatiles in finely ground insoluble polymers can also be determined with and without an extracting solvent.

1.2 This practice provides two procedures:

1.2.1 Procedure A-Automatic headspace analysis.

1.2.2 Procedure B-Manual injection headspace analysis.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 6.

Note 1-There is no known ISO equivalent to this standard.