A smart multisyringe flow injection system for analysis of sample batches with high variability in sulfide concentration

The detection limit (3sb/S) was 4.6 μg l−1. Two linear calibration graphs between 50-1000 and 500-10000 μg l−1 sulfide for reflectometry and spectrophotometry, respectively, were obtained. The potentialities of this method were assessed via the determination of sulfide at a wide range of concentrations (4.6 μg l−1 to 100 mg l−1). The high selectivity and sensitivity, the low reagent consumption and the miniaturization of the proposed automated method should be highlighted.