Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D4464-00(2005)
• Năm ban hành / Publication date: 2005
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Particle Size Distribution of Catalytic Material by Laser Light Scattering
• Chỉ số phân loại Quốc tế (ICS) / By field: 19.120 - Phân tích cỡ hạt. Rây (sàng)
• Số trang / Page: 3
• Phạm vi áp dụng / Scope of standard: 1.1 This test method covers the determination of the particle size distribution of catalyst and catalyst carrier particles and is one of several found valuable for the measurement of particle size. The range of particle sizes investigated was 30 to 300 µm equivalent spherical diameter. The technique is capable of measuring particles above and below this range. The angle and intensity of laser light scattered by the particles are selectively measured to permit calculation of a volume distribution using light-scattering techniques.1.2 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.