How effective your filters are for removing/ reducing VOC's?

Do you have any written documentation stating how effective your filters are for removing/ reducing VOC's?
Among water filtration industry it is generally known that coconut shell carbon is superior to bituminous or wood based carbon for VOC's reduction. To test a filter against a wide (1000's) spectrum of carbon based volatile organic compounds is costly prohibitive which the cost will reflect on the finished product. The next better carbon for VOC's reduction is catalytic carbon however it's available in GAC form only rather than extruded block. Our whole house automatic back wash filters can be purchased with catalytic carbon option. The written documentation is what you see on the filters cut sheet.