ASTM D1926-00(2019)
Standard Test Methods for Carboxyl Content of Cellulose

Standard No.

ASTM D1926-00(2019)

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D1926-00(2019)

Scope

1.1 These test methods cover the determination of the carboxyl content, or ion-exchange capacity, of cellulose from any source. Two test methods are described, the sodium chloride-sodium bicarbonate method (1)2 and the methylene blue method (2). The test methods must be used within their limitations, and it must be recognized that there is no way of determining the accuracy of any method for the determination of carboxyl. The precision of the sodium chloride-sodium bicarbonate method is low in the lower range of carboxyl values. The methylene blue method can be used over the whole range of carboxyl values; it is especially useful in the low range. It is not applicable to the determination of carboxyl in soluble carbohydrate material. Although these test methods may be used to determine the ion-exchange capacity of unbleached pulps, the residual lignin will cause an undetermined error, especially the sulfonic acid groups in unbleached sulfite pulps (3). 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 D1926-00(2019) Referenced Document

• ASTM D1193 Standard Specification for Reagent Water

ASTM D1926-00(2019) history

• 2019 ASTM D1926-00(2019) Standard Test Methods for Carboxyl Content of Cellulose
• 2000 ASTM D1926-00(2011) Standard Test Methods for Carboxyl Content of Cellulose
• 2000 ASTM D1926-00(2006) Standard Test Methods for Carboxyl Content of Cellulose
• 2000 ASTM D1926-00 Standard Test Methods for Carboxyl Content of Cellulose
• 1995 ASTM D1926-95 Standard Test Methods for Carboxyl Content of Cellulose