Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall
Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall
SIGNIFICANCE AND USE 5.1 This test method is suitable for use as a rapid control test for pulp manufacture or for careful determination of the viscometric molecular weight of purified cotton or wood derived pulps. 5.2 This test method is applicable over a very large range of cellulose molecular weights because seven sample sizes are defined. (Sample weights are reduced as cellulose molecular weight increases.) 5.3 Cotton and high molecular weight pulps may be difficult to dissolve. (Warning—This test method is only valid if the sample dissolves completely without gels.) SCOPE 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).2 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D6188-17(2022), Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall, establishes a procedure for measuring the viscosity of cellulose using the cuprammonium (CuAm) solution ball fall technique. This internationally recognized method provides a reliable means to estimate the molecular weight of cellulose in various materials, including wood pulp, cotton, and cotton linters. Applied widely as both a rapid process control test and a detailed analytical procedure, ASTM D6188 ensures accurate and precise results over a broad range of cellulose molecular weights.
This test is suitable for both in-process and finished products, making it highly applicable in pulp and paper manufacturing, textile processing, and quality control laboratories. It aligns with global standardization principles as set forth by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Другие стандарты ASTM
By implementing ASTM D6188, industries benefit from a robust, standardized viscosity measurement method that supports product development, certification, and regulatory compliance.
ASTM D6188 references and complements several other standards relevant to cellulose and laboratory practices, including:
Other related standards in cellulose analysis and viscosity determination may apply, depending on the specific application, industry, or regulatory framework.
Keywords: ASTM D6188, cellulose viscosity, cuprammonium ball fall, molecular weight, pulp testing, cotton viscosity, wood pulp analysis, process control, quality assurance, laboratory standards.