ASTM E180-85

D1013-93(1998)

Standard Test Method for Determining Total Nitrogen in Resins and Plastics (Withdrawn 2007)

D1727-60T(1976)

Method of Test for Urea Content of Nitrogen Resins (Withdrawn 1982)

ISO 5725

Accuracy (trueness and precision) of measurements and results

E1169-21(2026)

Standard Practice for Conducting Ruggedness Tests

E691-23

Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

E456-13a(2022)e1

Standard Terminology Relating to Quality and Statistics (Includes all amendments and changes 4/16/2024).

E178-21

Standard Practice for Dealing With Outlying Observations

E177-26a

Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods (Includes all amendments and changes 5/14/2026).

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications