Good afternoon, dear colleagues!

I need help with calculating the concentration of individual phenolic acids that have been identified by HPLC. In one of the samples of plant material, I determined

clorogenic acid - 24.16078 µg/ml;

caffeic acid - 13.66435 µg/ml;

syringic acid - 2.00828 µg/ml;

benzoic acid - 1.78858 µg/ml;

p-coumaric acid - 3.17923 µg/ml;

trans-ferulic acid - 8.21272 µg/ml;

synapic acid - 90.35565 µg/ml

trans-cinnamic acid - 1.54068 µg/ml;

cinnamic acid - 45.18552 µg/ml.

I need to convert these values to mg/g dry weight.

The weight of the dry plant material taken for extraction was 0.5 g.

I would really appreciate your help. I will be very grateful.