1.1本试验方法描述了通过测定纤维素材料（如木浆、棉花和棉短绒）的铜氨溶液的粘度来估算纤维素分子量的程序。该测试方法适用于快速、常规测试大量样品，具有准确性和精密度。本试验方法更新并扩展了美国化学学会（ACS）报告的程序。 1.2以国际单位制表示的数值应视为标准。 括号中给出的值仅供参考。 1.3本标准无意解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

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 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.