COD, Low Range EPA, Dichromate Method, Reagent Kit for 25 Test Vials (O2)

COD, Low Range EPA, Dichromate Method, Reagent Kit for 25 Test Vials (O2)

The HI-93754A-25 is a box of 25 reagent vials for COD, low range

*This method with chromium-sulphuric acid is officially recognised by EPA for wastewater analysis

• Accurate and repeatable measurements – Hanna COD reagents have been developed in accordance with Standard Methods 5220D, USEPA 410.4 and ISO 15705:2002 methods.
• Pre-dosed vials – Hanna vials contain approximately 3mL of pre-dosed reagent. The operator just needs to add a small quantity of the sample.
• Quick and accurate measurements – With pre-dosed vials, test preparation time is dramatically reduced. There is no time-consuming reagent preparation procedure or glassware cleaning.
• Safe reagents – Hanna COD reagents are safe for operators and the environment. Vials and caps have been designed to avoid accidental reagent spills. Due to the pre-dosed reagents, the amount of chemicals and handling time is minimised.

Eight kits for all testing requirements

COD levels vary depending on the application and process measuring points. Hanna offers reagents to cover four separate ranges:

• Low range: 0 to 150 mg/L O2
• Medium range: 0 to 1500 mg/L O2
• High range: 0 to 15000 mg/L O2
• Ultra High range: 0 to 60000 mg/L O2

Pre-dosed vials

Each Hanna vial contains the exact amount of pre-dosed reagent needed for the analysis. The operator just needs to add a small quantity of the sample.

Safe reagents

Hanna COD reagents are safe for operators and the environment. Vials and caps have been designed to avoid accidental reagent spills. Due to the pre-dosed reagents, the amount of chemicals and handling time is minimised.

Quick and accurate measurements

With pre-dosed vials, test preparation time is dramatically reduced. There is no time-consuming reagent preparation procedure or glassware cleaning.

Compact packaging

Each set of COD Vials is stored in fully recyclable, sustainable, compact plastic packaging. The ergonomic box design reduces the volume of collateral waste and required storage space.

The procedure guide is printed on the inside of the box lid.

About Chemical Oxygen Demand (COD)

Chemical Oxygen Demand is a measure of biologically available and inert organic matter that is susceptible to oxidation by a strong oxidising agent.

The Hanna COD method is based on the well-established closed dichromate-reflux colorimetric method. The colorimetric measurement of COD is faster and easier to perform than the titrimetric analysis; additional regents are not required.

The sample is added to the reagent vial and digested under closed reflux conditions and allowed to cool before measurement is taken. Reference standards can be made using potassium hydrogen phthalate (KHP), 1mg of KHP is equal to 1.175 mg COD.

The advantage of using this method includes certifiable results as well as high accuracy.

About the application

COD is used as a measurement of pollutants. It is normally measured in both municipal and industrial wastewater treatment plants and gives an indication of the efficiency of the treatment process.

COD can be measured on both influent and effluent water. The efficiency of the treatment process is normally expressed as COD removal, measured as a percentage of the organic matter purified during the cycle.

COD also has applications in power plant operations, chemical manufacturing, commercial laundries, pulp and paper mills, agriculture and animal waste runoff, environmental studies and general education.

Hanna equipment can be used in the laboratory or for on-site testing. The measurement procedure has been designed for ease of use by personnel at any skill level.

Methods

Hanna’s COD reagents have been developed in accordance with Standard Methods 5220D, US EPA 410.4 and ISO 15705.

Why choose Hanna’s COD reagents

• All scales start from 0 ppm so with each kit, it is possible to cover even the low scale.
• All reagents include a certificate of analysis.
• High resistance to chlorides – up to 2000 ppm for low and medium range vials; up to 20000 ppm for high and Ultra high vials

Safety warnings

• Corrosive
• Serious Health Hazard
• Toxicity
• Hazardous to the Environment