SH/T 1843-2024 in English
VALIDLight olefins for industrial use—Determination oftrace nitrogen — Chemiluminescence method
- Issued on:2024-04-10
- Implemented on:2024-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$117.00
本文件规定了工业用轻质烯烃中痕量氮测定的化学发光法。 本文件适用于氮含量在0.3mg/kg～100.0mg/kg范围的碳二～碳四轻质烯烃的测定。
Introduction
Technical background of the standard
This standard establishes the chemiluminescence detection system for trace nitrogen in light olefins for the first time, filling the gap in the standardization of nitrogen content detection of 0.3-100mg/kg in C2 to C4 olefins. Compared with traditional methods, chemiluminescence has the advantages of high sensitivity (up to 0.1mg/kg) and good selectivity.
Detailed explanation of the principle of the method
The nitrogen compounds in the sample are converted into NO through the combustion tube, which reacts with ozone to generate excited NO₂, and the attenuated emission light signal is detected by the photomultiplier tube. Key reaction formula:
| Reaction stage | Temperature requirement | Conversion efficiency |
|---|---|---|
| Combustion oxidation | ≥900℃ | ＞98% |
| Chemiluminescence | Room temperature | Quantum yield 0.1-1% |
Key equipment configuration
Typical configuration case: Quartz combustion tube needs to withstand high temperature of 1200℃, and the concentration of ozone generator needs to be stable at 1-3%. A laboratory used the Antek 9000 series detector in conjunction with a flash vaporization device, with an RSD of <2%.
Key parameters of standard curve
| Curve type | Concentration range(mg/L) | Linear requirement |
|---|---|---|
| Low concentration | 0.2-5 | R²≥0.99 |
| High concentration | 5-100 | R²≥0.995 |
Implementation precautions
Vaporization step: C4 olefins must be ensured to be completely vaporized, and it is recommended to use flash vaporization device; Anti-adsorption: Ammonia compounds require silanization of the pipeline.
Technology Evolution Analysis
Compared with the chemical titration method of GB/T 17674-2012, the detection limit of this method is reduced by two orders of magnitude, and the analysis time is shortened from 2 hours to 15 minutes, which is more suitable for the online monitoring needs of modern petrochemicals.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
SH/T 1141-2015 in English
Cracking C4 frection for industrial use. Determination of hydrocarbon composition. Gas chromatographic method
2015-07-14 -
SH/T 1151-1998 in English
Determination of high-speed mechanical stability of synthetic latex
1992-05-20 -
SH/T 0404-1996 in English
Paraffin photostability assay
1996-12-20 -
SH/T 0123-1992 in English
Determination of oxidation properties of extreme pressure lubricating oils
1992-05-20 -
SH 1051-1991 in English
Designation of Styrene-Butadiene Series Impact Polystyrene (SB) Molding and Extrusion Materials
1991-03-24 -
SH/T 0025-1990 in English
Antirust oil salt water immersion test method
1991-03-27 -
SH 0536-1993 in English
Bentonite Grease
1993-02-25 -
SH 2002-1991 in English
Technical conditions of ammonia evaporation tube crystallizer
1991-05-31 -
SH/T 3029-2014 in English
Code for design of exhaust bar rel and flarestack for petrochemical enterprises
2014-07-09
