An Environmental Friendly Procedure for Photometric Determination of Hypochlorite in Tap Water Employing a Miniaturized Multicommuted Flow Analysis Setup

Figure 1

Diagram of the flow analysis module. 𝑆 = sample or ClO⁻ standard solution; 𝑅=0.1 g L⁻¹ LCV solution; Bf = acetate buffer, pH 4.0; Int = homemade power driver interface; Mic = microcomputer; Dm = digital multimeter; 𝑃₁, 𝑃₂, and 𝑃₃ = solenoid minipumps; 𝐵₁, 𝐵₂, and 𝐵₃ = flow lines, Tygon tubing 40, 15, and 25 cm long, respectively, and 0.56 mm inner diameter; bd = bubble removing device; Ap = acrylic plates, length, width and thickness of 40, 30, and 10 mm, respectively; ℎ = holes, 2.0 mm diameter; Tm = Teflon membrane; fc = cutaway of the flow cell; W = waste; g = glass cylinders, 30 mm length and 1.0 mm diameter; LED = 𝜆_max of 590 nm, high bright (10,000 mcd); Te = transistor BC547; Det = photodetector OPT301; 𝐼₁ and 𝐼₂ = electromagnetic radiation beam from LED and to detector, respectively; 𝑆₀ = signal output (mV).