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 2

Assays carried out for foreign ions.

Foreign ion	Levels of concentration (µg L^−1)	Masking agent (MA)
Arsenic	0, 100, 200, 300	Without MA; KI; L-Cysteine; 1,10-Phenanthroline
Copper	0, 300, 600, 1000	Without MA; KI; L-Cysteine; 1,10-Phenanthroline
Chromium	0, 100, 200, 300	Without MA; KI; L-Cysteine; 1,10-Phenanthroline
Iron	0, 100, 200, 300, 600, 1000	Without MA