LOVIBOND COD VARIO LR 3–150 mg/L O₂ – 25 VIALS

Brand: Lovibond
Product: COD VARIO LR Tube Test
Parameter: Chemical Oxygen Demand (COD)
Measuring Range: 3–150 mg/L O₂
Range: Low Range (LR)
Pack Size: 25 Vials / 25 Tests
Catalogue No.: 2420720
Tube Diameter: 16 mm
Reagent Type: Pre-dosed COD digestion reagent
Method: Dichromate method
Application: Water & Wastewater Analysis

Product Overview

The Lovibond COD VARIO LR Tube Test 3–150 mg/L O₂, Cat. No. 2420720 is a ready-to-use tube test for the photometric determination of Chemical Oxygen Demand (COD) in water and wastewater samples.

The low-range test is designed for samples where COD concentrations fall within the 3–150 mg/L O₂ range. The product is supplied as a set of 25 pre-dosed reaction vials, providing 25 individual tests. Lovibond lists the product as a 16 mm VARIO COD tube test.

The VARIO tube format is designed for use with compatible Lovibond photometers and COD digestion systems. The 16 mm tube format is also documented as chemically and dimensionally suitable for compatible Hach instruments.

Key Features

• Low-range COD testing: 3–150 mg/L O₂
• 25 tests per pack
• Ready-to-use pre-dosed reagent vials
• 16 mm tube format
• Designed for photometric COD determination
• Suitable for routine water and wastewater testing
• Compatible with suitable Lovibond COD photometers and reactors
• Convenient sealed-vial testing format
• Suitable for laboratory and wastewater process-control applications
• Available as standard and separate mercury-free versions

Technical Specifications

Lovibond's product literature lists the standard VARIO COD 0–150 mg/L O₂ tube test as Cat. No. 2420720, 25 pieces; operating documentation specifies the LR range as 0–150 mg/L on the photometer method, while the catalogue/product description may state the analytical range as 3–150 mg/L O₂. For your product title, the manufacturer's stated 3–150 mg/L O₂ designation can be retained.

Test Principle

The COD test uses a dichromate digestion method. The water sample is added to the prepared reaction vial, followed by controlled digestion in a COD reactor. After digestion and cooling, the vial is measured photometrically.

Lovibond describes COD VARIO testing as photometric detection of COD after the sample has been added to the tube test and heated in a reactor.

Typical Test Procedure

1. Select the COD VARIO LR 3–150 mg/L O₂ vial.
2. Add the specified sample volume to the reaction vial.
3. Prepare the blank using TOC-free/deionised water as required by the applicable procedure.
4. Close the vial securely.
5. Carefully invert the vial several times to mix.
6. Digest the vial in a suitable COD reactor.
7. Allow the vial to cool according to the test procedure.
8. Mix carefully if required while cooling.
9. Insert the cooled vial into a compatible photometer using the 16 mm vial adapter.
10. Perform the zero/measurement procedure and record the COD result.

Lovibond operating instructions specify 2 mL sample for LR/MR tests and digestion at 150°C for 120 minutes, followed by cooling before photometric measurement. Always follow the instructions supplied with the specific Lovibond instrument and reagent batch.

Applications

Suitable for COD measurement in:

• Municipal wastewater
• Treated wastewater
• Industrial wastewater
• Effluent monitoring
• Environmental water analysis
• Process-water monitoring
• Wastewater treatment plants
• Laboratory water-quality testing
• Routine COD quality control
• Industrial process monitoring

Compatibility

The COD VARIO LR test is intended for use with compatible Lovibond COD photometer systems and digestion reactors.

Lovibond's COD VARIO systems use dedicated LR, MR and HR ranges, including 0–150 mg/L O₂, 0–1500 mg/L O₂ and 0–15000 mg/L O₂.

The 16 mm VARIO tube format is also documented as suitable for compatible Hach instruments; this should be treated as compatibility with the tube format/test chemistry rather than an indication of affiliation between Lovibond and Hach.

Pack Contents

1 × Lovibond COD VARIO LR Tube Test Set
25 × COD reaction vials

Catalogue No.: 2420720

Important Safety Information

COD VARIO vials contain chemical reagents and become hot during digestion and mixing. Use appropriate laboratory PPE, including suitable gloves and eye protection. Do not open or handle hot vials unnecessarily. Allow vials to cool before photometric measurement.

Dispose of used COD vials and chemical waste according to applicable laboratory, local and environmental regulations.

Important Product Identification

2420720 = Standard Lovibond COD VARIO LR, 3–150 mg/L O₂, 25 tests.