Fast Determination of the Main Reduced Sulfur Species in Aquatic Systems by a Direct and Second-Derivative Spectrophotometric Method

Table 3

Main qualitative parameters of the method obtained for the different chemical species: limits of detection and quantification (LOD and LOQ), linearity (R²), accuracy mean, and relative standard deviation (RSD).

	LOD (µM)	LOQ (µM)	R^2	Accuracy mean (%)	RSD (%)
Total sulfide	1.37	3.66	0.9997	0.23	3.45
Total sulfite	7.32	28.75	0.9998	−1.15	0.68
Total thiosulfate	1.92	4.16	0.9992	−3.71	0.61