COD Solution A (catalogue No. 114538) is a standardized liquid reagent component used in combination with COD Solution B for photometric determination of Chemical Oxygen Demand (COD) in aqueous samples. The product is suitable for environmental, industrial and drinking water quality monitoring in laboratories using Spectroquant® photometric methods.
COD Solution A, catalogue No. 114538 (Spectroquant), is a liquid reagent supplied by Merck for photometric determination of Chemical Oxygen Demand (COD) in water and wastewater samples. Used in conjunction with COD Solution B, this solution forms part of a two-component system enabling COD measurement across several ranges (e.g., 4.0–40.0 mg/L, 10–150 mg/L and 100–1500 mg/L) depending on the analytical protocol and the ratio of reagents used. COD analysis quantifies the oxygen equivalent of oxidizable organic and inorganic matter, serving as a key parameter in environmental and industrial water quality control.
Advantages
- Standardized reagent optimized for photometric COD determination with Spectroquant instruments.
- Enables flexible measurement ranges with corresponding reagent combinations.
- Suitable for environmental, drinking, industrial and wastewater testing.
- Liquid form simplifies preparation and consistent dosing per determination.
Technical specifications
| Reagent type | COD photometric reagent |
| Analyte | Chemical Oxygen Demand (COD) |
| Measurement application | COD determination in water and wastewater |
| Form | Liquid |
| Pseudo-measurement ranges | 4.0–40.0 mg/L; 10–150 mg/L; 100–1500 mg/L (with appropriate reagent combination) |
| Technique | Photometry (Spectroquant® method) |
| Typical applications | Environmental, industrial, drinking water and wastewater testing |
| Storage conditions | 15–25 °C |
| Brand | Merck |
