Patent ID: 8101136

Claim:
A kit for estimation of Chemical Oxygen Demand (COD) of an effluent sample, consisting of: a. a set of standard glucose solutions at a concentration ranging between 1 mg/L to 100,000 mg/L, with a COD concentration of 320 mg/L to 535 mg/L; b. three (3) reagents consisting of (a) 0.02 g mercuric sulfate, (b) 0.5 ml of 0.25 N potassium dichromate solution and (c) 1.5 ml of sulfuric acid-silver to be added individually to the standard glucose solutions; c. a COD color chart; d. a glass vial for receiving and mixing the standard glucose solutions with the three (3) reagents and the effluent sample at room temperature for 1 to 2 minutes e. a photometric cell for receiving the glass vial containing samples which have been diluted in accordance with the COD color chart as shown in FIG. 1 to a final COD value of 300 mg/L to 500 mg/L; f. a photometer adapted for use with the photometric cell suitable for measuring wavelengths in the range of 585 to 635 nm; g. at least one COD reference table corresponding to the COD color chart, with the proviso that the kit does not contain a heating element or a titrating device.