Application of Highly Purified Electrolyzed Chlorine Dioxide for Tilapia Fillet Disinfection

Table 1

Constituents of chlorine dioxide aqueous solution on different constituent ratios of electrolytes.

Electrolyte constituent ratio	20% NaCl
	7% NaClO2	8% NaClO2	9% NaClO2	10% NaClO2
Constituents of chlorine dioxide aqueous solution
ClO2 (ppm)	3193.76^d	3612.31^c	4232.49^b	4738.36^a
ClO2^− (ppm)	16.02^a	ND	ND	ND
ClO3^− (ppm)	ND	ND	ND	ND
Cl2 (ppm)	ND	9.75^b	10.64^a	10.64^a
Total chlorine* (ppm)	3209.78^d	3622.06^c	4243.12^b	4749.00^a
ClO2 purity** (%)	99.50^a	99.73^a	99.75^a	99.78^a
pH (unit)	2.36^a	2.34^a	2.38^a	2.18^b
Oxidation reduction potential (millivolt)	1.32^c	1.38^b	1.44^a	1.44^a

a--dMeans in the same column followed by different superscripts are significantly different at 𝑃<0.05 (Duncan’s multiple range test).
*Total chlorine (ppm) = ClO₂ + ClO₂⁻ + ClO₃⁻ + Cl₂.
**ClO₂ purity = [ClO₂/(ClO₂ + ClO₂⁻ + ClO₃⁻ + Cl₂)] × 100%.