ASTM D7808-22
Standard Practice for Determining the Site Precision of a Process Stream Analyzer on Process Stream Material

Standard No.

ASTM D7808-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7808-22

Scope

1.1 This practice describes a procedure to quantify the site precision of a process analyzer via repetitive measurement of a single process sample over an extended time period. The procedure may be applied to multiple process samples to obtain site precision estimates at different property levels 1.1.1 The site precision is required for use of the statistical methodology of D6708 in establishing the correlation between analyzer results and primary test method results using Practice D7235. 1.1.2 The site precision is also required when employing the statistical methodology of D6708 to validate a process analyzer via Practices D3764 or D6122. 1.2 This practice is not applicable to in-line analyzers where the same quality control sample cannot be repetitively introduced. 1.3 This practice is meant to be applied to analyzers that measure physical properties or compositions. 1.4 This practice can be applied to any process analyzer system where the feed stream can be captured and stored in sufficient quantity with no stratification or stability concerns. 1.4.1 The captured stream sample introduction must be able to meet the process analyzer sample conditioning requirements, feed temperature and inlet pressure. 1.4.2 This practice is designed for use with samples that are single liquid phase, petroleum products whose vapor pressure, at sampling and sample storage conditions, is less than or equal to 110 kPa (16.0 psi) absolute and whose D86 final boiling point is less than or equal to 400 °C (752 °F). NOTE 1—The general procedures described in this practice may be applicable to materials outside this range, including multiphase materials, but such application may involve special sampling and safety considerations which are outside the scope of this practice. 1.5 The values for operating conditions are stated in SI units and are to be regarded as the standard. The values given in parentheses are the historical inch-pound units for information only. 1.6 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. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the 1 This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee D02.25 on Performance Assessment and Validation of Process Stream Analyzer Systems. Current edition approved April 1, 2022. Published June 2022. Originally approved in 2012. Last previous edition approved in 2018 as D7808 – 18. DOI: 10.1520/D7808-22. *A Summary of Changes section appears at the end of this standard Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States 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. 1 Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D7808-22 Referenced Document

• ASTM D3764 Standard Practice for Validation of Process Stream Analyzer Systems
• ASTM D6122 Standard Practice for Validation of Multivariate Process Infrared Spectrophotometers
• ASTM D6299 Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance*， 2023-07-01 Update
• ASTM D6708 Standard Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material*， 2024-03-01 Update
• ASTM D7235 Standard Guide for Establishing a Linear Correlation Relationship Between Analyzer and Primary Test Method Results Using Relevant ASTM Standard Practices
• ASTM D7278 Standard Guide for Prediction of Analyzer Sample System Lag Times
• ASTM D86 Standard Test Method for Distillation of Petroleum Products

ASTM D7808-22 history

• 2022 ASTM D7808-22 Standard Practice for Determining the Site Precision of a Process Stream Analyzer on Process Stream Material
• 2018 ASTM D7808-18 Standard Practice for Determining the Site Precision of a Process Stream Analyzer on Process Stream Material
• 2012 ASTM D7808-12 Standard Practice for Determining the Site Precision of a Process Stream Analyzer on Process Stream Material