Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D2797-04
• Năm ban hành / Publication date: 2004
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Practice for Preparing Coal Samples for Microscopical Analysis by Reflected Light
• Chỉ số phân loại Quốc tế (ICS) / By field: 73.040 - Than
• Số trang / Page: 5
• Phạm vi áp dụng / Scope of standard: DESIG: D2797 04 ^TITLE: Standard Practice for Preparing Coal Samples for Microscopical Analysis by Reflected Light ^SCOPE:1. Scope 1.1 This practice covers laboratory procedures for the preparation of granular samples of bituminous coal and anthracite samples for examination with a microscope using reflected light illumination. It does not apply to the preparation of oriented blocks of coal.1.2 The values stated in SI units shall be considered as standard; and inch-pound units shall be considered as approximate equivalents.This standard does not purport to address the safety concerns 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.