T/CPCIF 0187-2022 Active Group standards

T/CPCIF 0187-2022 Diesel engine nitrogen oxide reducer - urea water solution (AUS 32) rapid analysis method: Near-infrared spectroscopy

Publish Date: 2022-02-21 Implement Date: 2022-05-20 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CPCIF 0187-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Chemical industry

ICS Name: Other chemical products

Publish Date: 2022-02-21

Implement Date: 2022-05-20

Scope

Scope: This document specifies the test method for analyzing the alkalinity, urea diurea and aldehydes in diesel engine nitrogen oxide reducer - urea aqueous solution (AUS 32) using near-infrared spectroscopy. This document is applicable to the rapid analysis of the quality indicators of diesel engine nitrogen oxide reducer - urea aqueous solution (AUS 32); Main technical content: By using the overtone or combination vibration of hydrogen-containing groups, the absorption spectra in the near-infrared region are obtained by transmission or reflection. After removing the interference of water peaks, the changes in absorbance caused by different contents of amino groups (—NH2) and hydroxyl groups (—OH) can be observed between 5,300 cm–1 and 7,000 cm–1. By using modern chemometric methods such as principal component regression and partial least squares, the linear or non-linear relationships between the changes in the first overtone or combination information of these groups and the alkalinity, urea diurea and aldehydes in diesel engine nitrogen oxide reducer - urea aqueous solution (AUS 32) are established. The absorption information of these groups is extracted, and a correlation model is established by linear fitting, so that the corresponding indicators can be quantitatively detected.