Table 2. Precision of the method evaluated as relative standard deviation at different concentration levels of A2780 cells.

Number of the experiment	Platinum concentration (ug/L)
	Low	Medium-low	Medium-high	High
1	42.8	80.4	117.1	186.3
2	43.6	82.4	118.0	187.5
3	43.9	82.5	119.9	190.6
4	44.0	82.8	120.1	191.2
5	45.8	83.4	120.4	191.8
6	47.4	85.7	121.6	193.6
Average	44.6	82.9	119.5	190.2
RSDa (%)	3.8	2.1	1.4	1.5

Notes.

^aRelative standard deviation.