File Name : figure s1.tif Caption : fig. s1 effect of the various acids on the signal/blank ratio. condition: kmno₄, 2.5 mm; rh.6g, 1 mm; pcm, 6.6 µm; sds, 5% (w/v); acid (hcl, h₃po₄, and h₂so₄), 0.01 m; all of the reagents dissolved in distilled water (n=5); ( monitored at 560 nm). File Name : figure s2.tiff Caption : fig. s2 response surface plot and contour plot of cl intensity as a function of: (a) rh.6g and kmno₄ concentration at h₂so₄, 0.01 m and sds 3.8% (w/v); (b) rh.6g concentration and sds% at h₂so₄, 0.01 m and kmno₄, 5 mm; (c) kmno₄ concentration and sds% at h₂so₄, 0.01 m and rh.6g, 1.4 mm; (d) rh.6g and h₂so₄ concentration at kmno₄, 5 mm and sds, 3.8% (w/v); (e) kmno₄ and h₂so4 concentration at sds, 3.8% (w/v) and rh.6g, 1.4 mm; (f) sds % and h₂so₄ concentration at kmno₄, 5 mm and rh.6g, 1.4 mm. all of the experiments were tested at the present of the pcm, 6.6 µm. File Name : figure s3.tiff Caption : fig. s3 (a) the effect of concentration of rh.6g. condition: pcm, 6.6 µm; sds, 5% (w/v); h₂so₄ 0.05 m; kmno₄, 2.5 mm; (b) the effect of concentration of sds. condition: pcm, 6.6 µm; rh.6g, 2 mm; h₂so₄, 0.05 m; kmno₄, 2.5 mm; (c) the effect of concentration of h₂so₄. condition: pcm, 6.6µm; sds, 4% (w/v); rh.6g, 2 mm; kmno₄, 2.5 mm; (d) the effect of concentration of kmno₄. condition: pcm, 6.6µm; sds, 4% (w/v); rh.6g, 2 mm; h₂so₄, 0.02 m. all of the reagents dissolved in distilled water. (n=5)