• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Home
  • Topics
    • Arts & Crafts
    • Education
    • Environment & Society
    • Family & Relationships
    • Funny
    • Health
    • Home & Garden
    • Animals & Insects
    • Science & Technology
    • Sports & Fitness
    • Style & Beauty
    • Travel & Entertainment
    • Cleaning
    • Childhood
    • Food
    • Vehicles
    • Finance & Business
  • About Us
  • Privacy Policy
  • Contact Us
Curiosity Insight

Curiosity Insight

Learning never exhausts the mind

How to Measure Orp in Water?

September 4, 2020 By Miranda Jackson Leave a Comment

Similar to how measurements quantify alkaline or acidic solutions by pH electrodes, solutions can also be established as reducing or oxidizing based on measurements of ORP values (sometimes called “REDOX”).

Oxidation is a process during which a molecule or ion loses electrons, unlike the reduction that is when it wins. Oxidation is always linked to the decrease so that if one element is oxidized, the other is automatically reduced.

Measurements

ORP measurements are based on the potential difference established between an indicator electrode and a reference electrode. The reference system is the same as that used for the pH electrode (Ag / AgCl), which is also used for redox measurements.

Redox electrodes are used to control many chemical processes, particularly those involving reversible reactions, such as the following:

Industrial Wastewater Treatment

The redox systems used in the treatment of water are the reduction of chromates and the oxidation of cyanide, mainly due to its toxicity to humans and the environment. The hexavalent chromium (Cr6 +) residual is reduced to trivalent chromium (Cr3 +) with the addition of sodium bisulfite or sulfur dioxide. In the case of cyanide, sodium hypochlorite or chlorine is used to oxidize cyanide, followed by hydrolysis of cyanogen chloride to form cyanate.

This parallel process of oxidation-reduction is known as redox and the ORP value is the measure of the activity of the electron compared to the activity of a reference electrode, which always maintains the constant potential.

Redox potentials are measured with an indicator electrode that is usually made of inert material and that is capable of absorbing or releasing electrons. The metals commonly used are platinum or gold. When the redox electrode is immersed in a solution containing a reversible chemical reaction system, the migration of electrons between the electrode and the system is established. This flow of electrons can be analyzed as an exchange current density and is extremely important for the rapid and reproducible measurement of the redox potential.

Water Sterilization

ORP measurements are increasingly being used as an effective measure of sanitation activity in drinking water, swimming pools and spas. The elimination time of the E.Coli bacteria in the water depends on the value of the redox potential. The ORP is a reliable indicator of the bacteriological quality of water. Water with an ORP value equal to or greater than 650 mV is within the parameters for swimming pool and spa waters.

Installing and Checking the Electrode

The ORP electrodes can be used in any pH / mV meter from Hanna.
1. After removing the protective cap from the electrode, soak the tip in warm tap water. This will increase the flow of the reference junction.
2. To check the function of the electrode, immerse the tip in the ORP solution (HI 7020). The value should be between 200 and 275 mV. Oxidation or reduction treatment with HI 7092 or HI 7091 will prepare the electrode surface and decrease the initial response time.

Filed Under: Science & Technology, Topics

About Miranda Jackson

I am a chemistry researcher and research various household products to make life easier and enjoyable for people around the world.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

E-mail Newsletter

  • Facebook
  • GitHub
  • Instagram
  • Pinterest
  • Twitter
  • YouTube

More to See

How to Protect Yourself Against Ticks

How to Protect Yourself Against Ticks?

December 20, 2020 By Miranda Jackson

How to Increase Platelet Count During Pregnancy

How to Increase Platelet Count During Pregnancy?

December 18, 2020 By Miranda Jackson

how to make a wasp trap with a water bottle

How to Make a Wasp Trap with a Water Bottle?

December 18, 2020 By Miranda Jackson

How to Make Rodent Repellent

How to Make Rodent Repellent?

December 18, 2020 By Miranda Jackson

How to Make a Bat House

How to Make a Bat House?

December 17, 2020 By Miranda Jackson

how to get rid of white grubs naturally

How to Get Rid of White Grubs Naturally?

December 17, 2020 By Miranda Jackson

How to Get Rid of Woodworm Beetle

How to Get Rid of Woodworm Beetle?

December 17, 2020 By Miranda Jackson

How to Get Rid of Field Mice in Your Home and Garden?

How to Get Rid of Field Mice in Your Home and Garden?

December 16, 2020 By Miranda Jackson

Footer

About US

At the curiosityinsight.com, we believe that it is possible to live better without spending more. But saving is difficult. So we want to make it easier for you. How? ‘or’ What?

We select and publish little life-changing tips every day. More precisely, we scan the Internet, test sometimes weird stuff, and even search our grandmothers’ closets to find you the best advice.

Recent

  • How to Get Rid of Snakes in Garden?
  • How to Protect Yourself Against Ticks?
  • How to Increase Platelet Count During Pregnancy?
  • How to Make a Wasp Trap with a Water Bottle?
  • How to Make Rodent Repellent?

Search

© 2020 Curiosity Insight · About US · Contact US · Privacy Policy