Division

Modified Horwitz equation for concentrations C < 1,2 × 10^{– 7}:

RSD_R = 22 %

where:

• RSD_R is the relative standard deviation calculated from results generated under reproducibility conditions$\left[\left(s_R∕\bar{x}\right)\times 100\right]$

• C is the concentration ratio (i.e. 1 = 100 g/100 g, 0,001 = 1 000 mg/kg). The modified Horwitz equation applies to concentrations C < 1,2 × 10^{– 7}.