Innovative carbon emission estimation strategy for biomass materials using near-infrared (NIR) spectrum

Rapid detection of chemical oxygen demand, pH value, total nitrogen, total phosphorus, and ammonia nitrogen in biogas slurry by near infrared spectroscopy

“…With the stricter sewage discharge standards and higher environmental quality requirements, the development of advanced test methods with the characteristics of automation, instantaneity and networking is in urgent need. 2 Recently, with the continuous progress in spectral technologies, near infrared reectance (NIR) spectral analysis has become a popular tool adopted in many elds, such as agriculture, [3][4][5] medicine, 6 petrochemical industry, 7 life sciences, [8][9][10] and environmental sciences. 11 In particular, it is extensively used in the latest advances, such as computer technology, 12 spectral technology, [13][14][15] chemometrics, 16,17 and other disciplines.…”