COD High Range Reagent Vials, Dichromate Method (25 tests) - HI93754C-25

Name: COD High Range Reagent Vials, Dichromate Method (25 tests) - HI93754C-25
Brand: Hanna Instruments
SKU: HI93754C-25
Price: 9375.75 INR
Availability: InStock

HI93754C-25

The HI93754C-25 are reagent vials that follow the dichromate method for the high range determination of chemical oxygen demand (COD) using a compatible benchtop photometer. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each box for traceability.

Pre-dosed reagents for ease of use
Supplied with certificate of quality
Marked with expiration date and lot number for traceability

*For Professional Use Only

The HI93754C-25 COD kit contains 25 ready-to-use vials containing pre-measured reagents. These high quality reagents follow follow an adaptation of the dichromate method for COD determination. In this method, a heated digestion is required to oxidize organic matter in the sample. During the digestion, hexavalent chromium in the reagent is reduced to trivalent chromium. The amount of reduced chromium is then measured colorimetrically. The intensity of color is determined by a compatible photometer and the COD concentration is displayed in mg/L (ppm) O₂. These reagents are designed to be used with samples that have an expected range of 0 to 15000 mg/L (ppm) O₂.

Hanna vials contain a pre-dosed amount of reagent so the user simply needs to add a small quantity of the sample. With pre-dosed vials, test preparation time is dramatically reduced and there is no time-consuming reagent preparation procedure or glassware cleaning. The vials and caps of the COD reagents have been designed to avoid accidental reagent spills. Due to the pre-dosed reagents, the amount of chemicals and handling time is also minimized.

Comparison of Methods

EPA - The EPA approved method 410.4 for COD determination requires the use of mercuric sulfate (HgSO₄). Mercuric sulfate is present in the EPA reagent vials to mitigate the interference of chloride in the measurement sample. This is a common requirement for wastewater treatment plants and food manufacturing facilities which tend to have higher concentrations of chloride present in their effluent. When using reagents that follow the EPA method, it is important to treat used vials as hazardous waste, as mercury waste requires recycling.

Dichromate - The dichromate method is adapted from the standard EPA and ISO methods for determination of COD, which are approved to measure COD concentrations ranging up to 1500 mg/L O₂. For samples with expected concentrations in the high range of 0 to 15000 mg/L O₂, the dichromate reagents can be used for accurate COD determination. It is important to treat used vials as hazardous waste, as mercury waste requires recycling.

Mercury-free - For those who do not wish to handle mercury reagents, our "green, "" mercury-free reagents are available for COD determination. These reagents are more sensitive to chloride interferences, as mercuric sulfate is not present. While the mercury-free reagents are easier to dispose of, they may be unacceptable for reporting purposes.

ISO - The ISO approved method 15705 for COD determination also requires the use of mercuric sulfate (HgSO₄) to reduce the interference of chloride. Containing similar chemical reagents as the EPA method, it is important to treat used ISO vials as hazardous waste, as mercury waste requires recycling.

Method	Parameter	Range (as O2)	Resolution	Accuracy	Reagent Code
EPA	COD LR	0 to 150 mg/L	1 mg/L	±5 mg/L ±5% of reading	HI93754A-25
EPA	COD MR	0 to 1500 mg/L	1 mg/L	±15 mg/L ±4% of reading	HI93754B-25
Dichromate	COD HR	0 to 15000 mg/L	10 mg/L	±150 mg/L ±3% of reading	HI93754C-25
Mercury-free	COD LR	0 to 150 mg/L	1 mg/L	±5 mg/L ±5% of reading	HI93754D-25
Mercury-free	COD MR	0 to 1500 mg/L	1 mg/L	±15 mg/L ±4% of reading	HI93754E-25
ISO	COD LR	0 to 150 mg/L	1 mg/L	±5 mg/L ±5% of reading	HI93754F-25
ISO	COD MR	0 to 1500 mg/L	1 mg/L	±15 mg/L ±4% of reading	HI93754G-25

Specifications

SKU	HI93754C-25
Name	COD High Range Reagent Vials, Dichromate Method (25 tests) - HI93754C-25
Package	vials
Quantity	25
Method	dichromate EPA

Manuals

COD High Range Reagent Vials, Dichromate Method (25 tests) - HI93754C-25

Handling & Disposal Guide

Precautions for safe handling

Ensure that there is an adequate earthing system for the equipment and personnel. Avoid contact with eyes and skin. Do not breathe powders, vapours or mists. Do not eat, drink or smoke during use. Wash hands after use. Avoid leakage of the product into the environment.

Conditions for safe storage, including any incompatibilities

Store only in the original container. Store in a ventilated and dry place, far away from sources of ignition. Keep containers well sealed. Keep the product in clearly labelled containers. Avoid overheating. Avoid violent blows. Keep containers away from any incompatible materials.

Disposal must comply with local government regulations. Do not pour them into drains or dispose of them in regular trash. Contact your local waste disposal facility for proper disposal guidelines.