How Can I Find Information on COD and International Standards for Water Quality?

[Leaping antalope]

Hi everyone:
I am doing my Chemistry group project right now, it is something about the water quality. And I am in charge of the COD (Chemical oxygen demand) part. The teacher told me that COD contains two parts: concentration (mg/L)and light absorbance rate (A)...something like that (I translated it from Chinese). But I didnt found any related information about the "light absorbance rate" on the internet. Can anyone give me some information about COD?
Also, can someone tell me how can I get the international standards (or standards of other countries, or organizations such as UN or EU) of water quality (COD, BOD, DO...etc)? Thanks a lot!

 

[osskall]

Wow, right above me, I just had a link "Biological oxygen demand", linking to www.polyseed.com[/url]. Now my second window has been directed to [url]http://www.interlabsupply.com/[/URL], where it says:

Welcome to InterLab Supply, your complete source for BOD testing and home of the "Original" PolySeed

Well, there ye have at least something to start with :wink:

 

[ravenprp]

Hi there,

It sounds like you have a very interesting project on water quality for your Chemistry group project. The COD part sounds like a crucial component, as it measures the amount of oxygen needed to chemically break down organic matter in water. To answer your question, the "light absorbance rate" is also known as the optical density, which is a measure of how much light is absorbed by a substance. In this case, it refers to the amount of light absorbed by the water sample due to the presence of organic compounds.

As for finding information on COD, I recommend checking out scientific journals or databases such as PubMed or ScienceDirect. You can also consult your teacher or a chemistry textbook for more information on the topic. Additionally, you can reach out to your classmates or other students who may have done a similar project in the past for guidance.

To find international standards for water quality, you can refer to the World Health Organization (WHO) or the United Nations (UN) for guidelines and regulations. You can also check with your local government or environmental agencies for specific standards and regulations in your country.

I hope this helps and good luck with your project! Chemistry can be a complex subject, but with thorough research and collaboration with your group, I am sure you will produce an excellent project. Best of luck!