Total Arsenic, Cadmium, and Lead Determination in Brazilian Rice Samples Using ICP-MS

Table 4

Certified value, obtained value, relative bias (%), and repeatability (RSD%) obtained for IRMM 804 acid digested in microwave oven.

Element	Certified value; (mg kg^−1)	Uncertainty; (mg kg^−1)	Obtained value (mg kg^−1)	Standard deviation; (mg kg^−1)	Bias (%)	Repeatability (RSD%)
As	0.049	0.004	0.051	0.001	4.1	1
Cd	1.61	0.07	1.60	0.05	−0.6	3
Pb	0.42	0.07	0.44	0.04	4.8	10

As indicated in the IRMM 804 certificate.
Calculated as the mean of seven independent replicates of the IRMM 804.