Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D6188-97(2003)
• Năm ban hành / Publication date: 2003
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall
• Chỉ số phân loại Quốc tế (ICS) / By field: 85.040 - Bột giấy
• Số trang / Page: 7
• Phạm vi áp dụng / Scope of standard: 1.1 This test method describes the procedure for estimating the molecular weight of cellulose by determining the viscosity of cuprammonium (CuAm) solutions of cellulosic materials, such as wood pulp, cotton, and cotton linters. This test method is suitable for rapid, routine testing of large numbers of samples with high accuracy and precision. This test method updates and extends the procedure reported by the American Chemical Society (ACS).1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.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.