you could contact the method of HOLDEN( 1965) .Chlorophylls. in;Chemistry and Biochemistry of plant pigments,editor,GOODWIN,Academic Press, London.1965

Check this thread:

https://www.researchgate.net/post/How_could_we_remove_chlorophyll_from_plant_extracts_during_purification_of_natural_compounds?tpr_view=cf963c49-6fdb-43d5-a01f-f1e47d31e8b6_1

https://www.researchgate.net/post/How_can_I_remove_chlorophyll_from_leaf_extract

I used to do that for undergraduate students(2nd year students) by paper chromatography and then,  eluting  the  remaining pigments such as carotenoids, and  then i will determine their concentration by spectrophotometry .

check these related treads

https://www.researchgate.net/post/How_can_I_measure_the_concentration_of_the_chlorophyll_in_the_eluent?tpr_view=8d0fb62a-4df7-4d4b-a492-edd46f43f3cb_2

https://www.researchgate.net/post/How_can_I_remove_chlorophyll_from_plant_extract?tpr_view=12502d85-0415-4a8a-9419-c5db2a876cb3_2

https://www.researchgate.net/post/What_is_the_best_way_to_isolate_leaves_with_a_lot_of_chlorophyll

https://www.researchgate.net/post/Before_extraction_from_leaf_material_how_can_I_get_rid_of_pigments_like_chlorophyll

https://www.researchgate.net/post/How_can_I_remove_chlorophyll_from_leaf_extract_without_losing_other_secondary_metabolites