Masking Agents Evaluation for Lead Determination by Flow Injection-Hydride Generation-Atomic Fluorescence Spectrometry Technique: Effect of KI, L-Cysteine, and 1,10-Phenanthroline
Table 3
Results of the effect of foreign ions and masking agents on the analytical signal of 10 µg Pb L−1.
Foreign ion concentration (µg L−1)
FI without masking agent
Recovery (%)
FI with KI
Recovery (%)
FI with L-cysteine
Recovery (%)
FI with 1,10-phenanthroline
Recovery (%)
Arsenic
0
1071 ± 4
1036 ± 2
1026 ± 2
1089 ± 12
100
997 ± 3
93
1043 ± 6
101
995 ± 5
97
1097 ± 7
101
200
988 ± 7
92
968 ± 5
93
844 ± 9
82
1016 ± 10
93
300
874 ± 0.2
82
887 ± 3
92
681 ± 4
66
1009 ± 8
93
Copper
0
1071 ± 9
1036 ± 11
1026 ± 2
1071 ± 9
300
734 ± 5
69
935 ± 7
90
631 ± 5
61
1442 ± 17
135
600
842 ± 7
79
842 ± 7
90
627 ± 25
61
1442 ± 25
135
1000
719 ± 4
67
719 ± 4
85
477 ± 2
46
1395 ± 17
130
Chromium
0
1057 ± 4
1036 ± 11
950 ± 4
1071 ± 9
100
770 ± 9
73
755 ± 9
73
763 ± 3
80
768 ± 7
72
200
760 ± 12
72
762 ± 2
73
747 ± 12
79
768 ± 16
72
300
933 ± 13
88
932 ± 1
90
675 ± 5
71
768 ± 20
72
Iron
0
1057 ± 4
100
1025 ± 16
96
200
1009 ± 13
95
300
1006 ± 8
95
600
1019 ± 17
96
1000
1009 ± 7
95
FI: fluorescence intensity. Measurements reported as the mean ± SD ().
