To the best of my knowledge, cellulose can't be detected through HPLC because it is insoluble in water. Cellulose is mostly detected by Gravimetric analysis. You can follow the procedure developed by NREL (https://www.nrel.gov/docs/gen/fy13/42618.pdf).
Ganesh Parsai I hope you would have received the answer of your query by now. If not, can you please let us know what form of cellulose you want to analysis? If you already got the response, can you please share here for the benefit of all of us? Thank you