Dear Wan Mohamad Ikhmal, thermal and mass spectroscopy techniques will show the different VOC(s) with their corresponding evolution with respect to time and temperature and any other conditions. My Regards

Dear Dr. Wan Mohamad Ikhmal,

volatile organic compound (VOC) definitions, standards and methodologies for its evaluation, vary in different regions of the world and continue to evolve.

Below I suggest to you some notes that I hope can be useful to you in the "operative" choices :

- VOC Test Methodology

https://www.pcimag.com/articles/99103-voc-test-methodology

- ASTM and ISO VOCs in Coatings - Method Comparison Matrix

https://www.astm.org/COMMIT/TC35_Matrix.xls

- Direct Methods for Analyzing Volatile Organic Compounds in Coatings

https://www.astm.org/SNEWS/NOVEMBER_2006/p_wiljon_nov06.html

- Development of an Improved VOC Analysis Method for Architectural Coatings

https://www.arb.ca.gov/coatings/arch/Final_Report_3_25_09.pdf

- Evaluation of VOC Emission MeasurementMethods for Paint Spray Booths

https://www.tandfonline.com/doi/pdf/10.1080/10473289.1995.10467360

My best regards, Pierluigi Traverso

Thank you very much Dear Dr. Pierluigi Traverso !! :D Thats really helpful

https://ww3.arb.ca.gov/research/seminars/jones2/jones.pdf

http://www.apas.gov.au/PDFs/D181.pdf

https://apps.dtic.mil/dtic/tr/fulltext/u2/a494061.pdf

ASTM D 7232. Standard Test Method for Rapid Determination of the Nonvolatile Content in Coatings. Annu. Book ASTM Stand. 1996.

ASTM D 3960. Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related Coatings. Annu. Book ASTM Stand. 1996.