Palintest COD (Merc-Free), Photometer Tubetests, 500 - 20,000 mg/L O2
Palintest COD (Merc-Free) Photometer Tubetests are high-range testing tubes, designed to measure chemical oxygen demand (COD) in water samples, offering a detection range of 500 to 20,000 mg/L o2.
These tests provide a mercury-free solution, making them safer for users and the environment. Designed for use with the Palintest photometers, these tubetests deliver fast, accurate readings that help to determine the amount of organic pollutants in wastewater, industrial effluents and environmental water sources.
Ideal for use in water treatment plants, environmental monitoring and regulatory compliance, these tests ensure effective pollution control without the use of harmful chemicals.
Chemical oxygen demand (COD) is a vital test for assessing the quality of effluents and waste waters prior to discharge. The COD test predicts the oxygen requirement of the effluent and is used for the monitoring and control of discharges and for assessing treatment plant performance.
The standard test for COD involves digesting the sample with strong sulphuric acid solution in the presence of chromium and silver salts. These potentially hazardous chemicals clearly need to be handled with extreme care.
The Palintest COD Tubetests system offers a method which is both practical and convenient. The reagents are supplied premixed keeping potentially hazardous chemicals to a minimum. The test is simply carried out by adding the sample to the tube, closing the cap and then digesting for two hours at 150°C. The tubes are then cooled and the test colour measured using a Palintest 7100 or 7500 range of photometers
The reagent formulations are based on those specified in recognised international standard methods and meet the requirements of conformity testing against national and international standards.
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.