Table 7.

Precision tests of Rb and Cs measurements in brine samples.

Sample	Dilute factor	Rb measurement (μg·L−1)											RSD%
		1	2	3	4	5	6	7	8	9	10	11
1-Rb	10	24.7	23.2	24.2	25.2	24.8	24.9	25.34	25.1	25.2	24.0	25.1	2.64
1-Cs		0.251	0.209	0.225	0.230	0.230	0.222	0.225	0.226	0.228	0.214	0.219	4.77
2-Rb	10	92.8	89.8	88.9	91.0	93.7	93.6	91.2	94.8	85.9	87.8	89.2	3.05
2-Cs		2.92	2.89	2.88	2.72	2.74	2.90	2.89	2.87	2.75	2.76	2.79	2.68