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  Indian J Med Microbiol
 

Figure 2 : Spectral scans of the standard solution in different color reactions according to various dosages of sulfate (A) and time points (B) (A) dosages of sulfate: (1) 2 ml; (2) 3 ml; (3) 4 ml; (4) 5 ml (B) time points of color reaction: (a) 15 min; (b) 25 min; (c) 35 min; (d) 45 min

Figure 2 : Spectral scans of the standard solution in different color reactions according to various dosages of sulfate (A) and time points (B) (A) dosages of sulfate: (1) 2 ml; (2) 3 ml; (3) 4 ml; (4) 5 ml (B) time points of color reaction: (a) 15 min; (b) 25 min; (c) 35 min; (d) 45 min