A method using the q-ICP-MS analysis of 19 elements has been developed to differentiate organic and conventional Brazilian rice samples. 17 certified organic samples and 33 conventionally grown rice samples from 5 different regions in Brazil were analysed, and using 19 elements it was possible to predict with 98% confidence the authenticity of the rice samples. Just using calcium and cadmium, it was possible to predict the authenticity with 96% confidence.
Read the full preliminary unedited pdf paper at:
http://www.sciencedirect.com/science/article/pii/S0889157515002008
