If I had to guess: mass in and C content; residual mass and C content, if you can do these measures more readily than CO2 and other C containung emissions
The CO2 produced with reaction of carbon with oxygen, most biomass, including wood, is composed of roughly 50% carbon by weight, 40% oxygen and 5% hydrogen. A 50-megawatt electric power plant burning wood pellets would emit 43,730 tons of carbon as carbon dioxide each year, The calculation of carbon stock as biomass consists of multiplying the total biomass by a conversion factor that represents the average carbon content in biomass.generally 1 m³ wood stores 1 tonne CO2. Each cubic metre of wood grown holds just under a tonne of carbon dioxide 'sequestered' from the atmosphere. The total carbon emissions absorbed by forests around the world is around 2.5 billion tonnes of carbon dioxide.
https://www.researchgate.net/publication/315940391_Energy_consumption_and_equivalent_emission_of_CO2_at_wood_pellets_production_in_Serbia
Prem Baboo thank you for taking the time to provide me with such a thorough answer.
To determine the amount of CO2 released from burning biomass wood pellets on a lab scale, the most accurate method is to use a specialized gas analyzer known as a flue gas analyzer. Here's a step-by-step guide on how to perform this measurement:
It's important to note that this method provides a quantitative measurement of CO2 emissions specific to the combustion process. However, to obtain a comprehensive understanding of the environmental impact, it is also essential to consider other emissions such as particulate matter, nitrogen oxides (NOx), and volatile organic compounds (VOCs). Additionally, conducting multiple replicate experiments and averaging the results will enhance the accuracy and reliability of the CO2 emission measurement. @Charlene Scott