The samples of black rice (O. sativa L.) were acquired commercially
in Ponta Grossa, PR, Brazil, from the 2012 harvest. The rice
was ground in an analytical mill to 10 mesh (QUIMIS-6298A21).
Then, the samples of rice flour were distributed in low density
polyethylene containers and sealed. All samples were stored
immediately at 8 C after milling until analysis.