On July 1, 2024, the portable tunable laser absorption spectroscopy method for the determination of ammonia in exhaust gases from fixed pollution sources (T/SSESB 10-2024) was officially implemented. In order to implement the Environmental Protection Law of the People's Republic of China and the Air Pollution Prevention and Control Law of the People's Republic of China, prevent and control ecological environment pollution, improve ecological environment quality, and standardize the portable determination method of ammonia in exhaust gas from fixed pollution sources, this standard is specially formulated.

The group standard is led and organized by the Shanghai Environmental Science Society. The project undertaking units, including the Shanghai Chemical Environmental Protection Monitoring Station, Shanghai Environmental Monitoring Center, and Shanghai Alwaysbrong Applied Technology Co., Ltd., jointly established a standard drafting group to carry out research on the group standard and participate in its formulation.

This is the first group standard in China for the determination of ammonia in waste gas from fixed pollution sources, portable tunable laser absorption spectroscopy, which effectively fills the gap in the standard for the determination of ammonia in waste gas from solid pollution sources using portable tunable laser absorption spectroscopy.

This group standard provides corresponding regulatory recommendations for the performance requirements, analysis steps, instrument verification, sample measurement, and result calculation of portable tunable laser absorption spectrometers. It emphasizes that the sample measurement results should be between 20% and 100% of the instrument calibration range. Otherwise, the range should be re selected and calibrated with ammonia standard gas.

Shanghai Alwaysbrong Co., Ltd. actively implements the spirit of the National Standardization Development Outline, and further enhances the standardization level around the high-quality development needs of the environmental protection instrument industry. In the formulation of the relevant standards for portable tunable laser absorption spectroscopy for the determination of ammonia in exhaust gases from fixed pollution sources, from laboratory analysis to on-site testing, the deep participation of Alwaysbrong's portable ammonia analyzer PreGASS-3500 can be seen. The experimental results show that the device has high accuracy, good anti-interference ability, and high sensitivity.

Portable ammonia analyzer (PreGASS-3500)

⚪  Adopting Tunable Semiconductor Laser Absorption Spectroscopy (TDLAS) technology, it is not affected by other gases (water vapor, SO2, NOx, CO, etc.) and has high detection accuracy;

⚪  The system is simple in composition and easy to operate;

⚪  High temperature tracing at 220 ℃ throughout the entire process, with no cold points in the gas path to avoid sample gas loss;

⚪  Integrated pressure sensor, which can achieve convenient and fast gas leak detection function;

⚪  The sampling flow rate can be manually adjusted according to on-site conditions and requirements;

⚪  Real time display of ammonia concentration measurement curve;

⚪  Multiple data recording methods, supporting USB copying of data;

⚪  Can be connected to a miniature thermal printer for real-time printing of test data;

With the official introduction of the group standard "Portable Tunable Laser Absorption Spectroscopy for the Determination of Ammonia in Waste Gas from Fixed Pollution Sources", the determination of ammonia in waste gas from fixed pollution sources will receive more standardized development, as well as an effective detection technology system, which puts forward higher quality requirements for industry development, is conducive to optimizing market order and promoting the development of national environmental protection.