User:Ooogaboooga 101/Chemical purity/Bibliography

You will be compiling your bibliography and creating an outline of the changes you will make in this sandbox.

Outline of proposed changes
The key changes I propose for the page include:

1) Including an image or two where readers would see these grades being issued/used/viewed in the real world

2) Expanding on the definitions listed

3) Adding in a couple missing grades (for example spectroscopic grade and photograph grade)

4) Provide context to why these grades are of the highest purity. Why these are the ones we defer to or why certain places don’t. (Ie expanding on the intro and creating an outro to hopefully help provide context and more of a worldwide view on the topic)

5) Fix duplicate references and add some to the definitions lacking them.