Method

[Cr³⁺] taken

mol/L

[Cr³⁺] found mol/L

Absolute error

% RSD

Intra-day Accuracy and precision

0.00110

0.00130

0.00020

0.90

0.00400

0.00380

−0.00020

5.40

0.00080

0.00084

0.00040

3.18

Inter-day Accuracy and precision

0.00110

0.00132

0.00022

1.24

0.00400

0.00494

0.00094

1.78

0.00080

0.00087

0.00007

3.71