Reversed-Phase Column Extractive Separation of Gd(III) with Poly[dibenzo-18-crown-6]

Table 4

Reproducibility of the method.

Sr. no.	Gd(III) 100 μg	Recovery %	S.D
1	100	99.9	0.010
2	100	99.9	0.069
3	100	98.9	0.005
4	100	99.2	0.032
5	100	99	0.014
6	100	99.3	0.010
7	100	98.9	0.032
8	100	99.6	0.062
9	100	99	0.015
10	100	99.8	0.033
11	100	99.8	0.047
12	100	99.8	0.023
13	100	99.6	0.010
14	100	99	0.015
15	100	99.8	0.037
16	100	99.85	0.031
17	100	99.92	0.060
18	100	99.8	0.034
19	100	98.75	0.010
20	100	98.99	0.016
21	100	99.96	0.011
22	100	99.93	0.040
23	100	98.8	0.015
24	100	98.88	0.010
25	100	99.9	0.010
26	100	98.75	0.053
27	100	98.89	0.016
28	100	99	0.005
29	100	99.36	0.008
30	100	99.63	0.011