T/GPCIA 0008-2022 Active Group standards

T/GPCIA 0008-2022 Diesel Engine Nitrogen Oxide Reducing Agent Automotive Urea Aqueous Solution (AUS 32) Rapid Quantitative Detection by Near-Infrared Spectroscopy

T/GPCIA 0008-2022

Publish Date: 2022-10-19 Implement Date: 2022-11-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Price: $ 20.00

Out of stock

Basic Information

Standard Code: T/GPCIA 0008-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Chemical industry

ICS Name: Other chemical products

Publish Date: 2022-10-19

Implement Date: 2022-11-01

Scope

Scope: This document specifies a method for rapid quantitative detection of nitrogen oxide reducer - urea aqueous solution (AUS 32) in diesel engines using a combination of near-infrared spectroscopy and chemometrics. This document is applicable to the rapid detection of urea content, refractive index, urethane dimer, and aldehydes in nitrogen oxide reducer - urea aqueous solution (AUS 32). It is not recommended for use as an arbitration test. Main technical content: Table 1 - Standard analysis items, methods, and repeatability and reproducibility indicators for automotive urea aqueous solution (AUS32). Test method Range Repeatability Indicator Reproducibility Indicator Urea, % (mass fraction) GB 29518 Appendix A 30.0～35.00 0.4 1.0 Refractive index (20?℃) GB/T 6141.3 814～1.3843 Not specified Not specified Urethane dimer, % (mass fraction) GB 29518 Appendix C 0.1～0.5 0.010.04 Aldehydes (calculated as formaldehyde), mg/kg GB 29518 Appendix D 0.5～100 1.04 0.5X Note: X represents the average of the two results. Table 2 - Repeatability and accuracy of various properties of automotive urea aqueous solution (AUS32). Item Repeatability Accuracy Urea, % (mass fraction) 0.6 1.0 Refractive index 20nD 0.0016 0.0028 Urethane dimer, % (mass fraction) 0.03 0.04 Aldehydes (calculated as formaldehyde), mg/kg 0.4 1.3