ASTM-E1721:2024 Edition

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E1721-24 Standard Test Method for Determination of Acid-Insoluble Residue in Biomass

Published By	Publication Date	Number of Pages
ASTM	2024

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Categories: 65.040.20 - Buildings and installations for processing and storage of agricultural produce, ASTM

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Description

ASTM E1721-24

Active Standard: Standard Test Method for Determination of Acid-Insoluble Residue in Biomass

ASTM E1721

Scope

1.1 This test method covers determination of the acid-insoluble residue of hard and soft woods, herbaceous materials (such as switchgrass and sericea), agricultural residues (such as corn stover, wheat straw, and bagasse), wastepaper (such as office waste, boxboard, and newsprint), acid and alkaline pretreated biomass, and the solid fraction of fermentation residues. All results are reported relative to the 105 °C oven-dried weight of the sample.

1.2 The residue collected contains the acid-insoluble lignin and any condensed proteins from the original sample. An independent nitrogen analysis would be required to determine the acid-insoluble lignin content separate from the condensed protein fraction and is outside the scope of this test method.

1.3 A portion of the lignin in some biomass samples will remain soluble during this procedure. The total lignin in a biomass sample includes both acid-soluble lignin and lignin in the acid insoluble residue.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 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. Specific hazards statements are given in Section 8 and Note 3 and Note 5.

1.6 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.

Keywords

acid-insoluble lignin; agricultural residue; biomass; fermentation residue; herbaceous; lignin; wastepaper; wood;

ICS Code

ICS Number Code 65.040.20 (Buildings and installations for processing and storage of agricultural produce)

DOI: 10.1520/E1721-24

Additional information

Standard Title	E1721-24 Standard Test Method for Determination of Acid-Insoluble Residue in Biomass
Published Code	ASTM
Publication Date	2024
ICS Codes	65.040.20 - Buildings and installations for processing and storage of agricultural produce